What should we make of the fact that the richest person in the world has joined forces with Donald Trump and promises now to serve the United States as some sort of czar of government “efficiency”? And what should we make of the world’s biggest pop star endorsing Kamala Harris for president?

Why should it matter that these mega-celebrities tell us what they want from politics and government?

The morning after Taylor Swift endorsed Harris for president, Elon Musk defended his new buddy, Trump, in the most disturbing and bizarre fashion, referring to the Republican obsession with women who have chosen not to have children and have cats. “Fine Taylor … you win … I will give you a child and guard your cats with my life,” Musk, who has impregnated at least one of his employees and has reportedly propositioned others, wrote on X, formerly known as Twitter.

Swift, in contrast, has declared over the past four years that she cares deeply about women’s issues and has motivated her followers around the world to register to vote and get active in politics. Her engagement has been serious and sincere. Swift, more than any other celebrity, has the opportunity to assume the role of the champion of democracy in America. She writes and sings about the personal yet connects the personal to the political through the descriptions of power and mistreatment in relationships. To many, the connections between power imbalances and mistreatment in personal relationships and those in society at large are strong yet implicit. Swift has moved in recent years to make them explicit.

So Swift’s endorsement is not so much about swaying undecided voters through her charisma. That’s a myth. Rather her endorsement is about harnessing all the activist energy she has been building over the years and focusing it on getting young people registered to vote and willing to volunteer for a cause. She is expanding the electorate and infusing it with optimism and purpose. That’s a blessing to anyone who cares about the fate of democracy in the United States.

In stark contrast, the other billionaire in this spat has done everything he can to undermine belief in government by the people and for the people. His long hostility to safety and securities regulation makes sense, given his role as a corporate leader. His deep-seated racism and sexism have become even more vocal since he found common cause with Trump and other Republicans. Musk wants a smaller set of political actors in the world. They should be his buddies, all men, and all who assume they know what’s best for the world. It does not help that he is neither smart nor serious about policy nor politics.

Yet the nominee of one of the two major American political parties has declared he wants Musk to assume a powerful role in the next government. We could approach this question by examining Musk’s record as a corporate leader, which is spotty at best. We could address Musk’s habits of exaggeration and prevarication, which are significant. We could wonder how a person who is supposed to be running five companies already might have the time to also head up a major government initiative.

Or we could just conclude that neither Musk nor Trump are serious people with any idea how to execute policy, let alone devote time, energy and thought to the process. That’s not a reason to suspend concern about this partnership. Musk’s threats to the United States go far beyond any potential office he might hold in the future.

Policy is not for amateurs. We learned this the hard way during the first Trump administration, when the few veteran policymakers who were willing to keep the government operating were one by one pushed out of power by Trump or his cronies.

To change the way any federal government office operates, one must generate a feasible proposal and seek affirmation and criticism from stakeholders. Those stakeholders might include corporations and their lobbyists, unions and their lobbyists, and public interest groups that range from the National Rifle Association to the Sierra Club. They also include elements of the executive branch who might have to implement that policy. And, of course, plenty of lawyers and economists must weigh in. Often, if generated by an office of the executive branch, the public must be invited to submit comments on a draft of a policy statement.

And, once all of that happens, policy changes are subject to court scrutiny if an interested party decides to sue over it. In other words, it takes a long time and a lot of effort to change even small things that the government does. It takes skill, knowledge, diligence and a whole lot of patience to enact policy.

It’s not work appropriate for the flippant, unserious or easily distracted.

Now, that’s how it’s done in normal times. We can assume that normal times would come to a permanent end in the United States if 78-year-old Donald Trump takes the oath of office again on 20 January 2025. He has promised radical change in the basic workings of government, down to promising to ignore or “terminate” the constitution if he does not get his way.

How he would do this is unclear. We can assume that he would have some elements willing to use force to wrest control of the government away from processes and the limits of law. And we know that Trump has managed to turn the federal courts into instruments of his own interests. All of that would take work, of course. The only thing that saved the government from complete breakdown during Trump’s term in office was his inability to focus and follow through on his indignation and ambition. The friction of bureaucracy turned out to be one of the last bastions holding up the fragile republic.

The best Trump can hope to accomplish is chaos and breakdown along with massive corruption that would flow as the failsafes of oversight and accountability collapse.

That’s what makes the whole Musk partnership so absurd. Assume for a moment that Musk were a serious, committed, competent leader and manager. Under the Trump style of administration, what possibility would there be for him to discipline a sprawling federal agency such as the Department of Health and Human Services or the Department of Defense?

It would not matter. Again, it’s folly to take this effort seriously as an effort to do what Trump or Musk say it would do. Musk, like Trump, is only interested in how any effort could smooth the way for his own benefit. Over the past decade or more, Musk has found his various companies, especially Tesla, entangled with regulators over issues ranging from safety to securities violations.

His leadership of SpaceX and its subsidiary Starlink, which provides satellite internet access to many millions of people around the world including essential elements of the military and government of Ukraine, has come under scrutiny as Musk has grown closer to the Russian view of the invasion of Ukraine. SpaceX is a major defense contractor. The United States government already depends on SpaceX way too much, and SpaceX depends on the United States government for much of its revenue.

Having Musk involved at the highest levels of a government that is supposed to be curbing his excesses and protecting the public interest from the worst externalities of his companies is beyond a conflict of interest. It’s naked corruption. And that is the point. It’s positively Putinesque.

Musk is, of course, unlikely to even assume such an office or hold a meeting if he did. He does not have the ability to focus these days. His incessant tweeting at all hours is increasingly unhinged from reality. His drug use, according to reporting by the Wall Street Journal, has reached a concerning level at which investors in Tesla are worried about his ability to protect their interests. He seems not to be putting in the time to do his current jobs well, even the one at Tesla that supplies him with most of his wealth.

Musk’s closeness to Trump is itself a cause for concern. Even without Musk in office, Trump would probably order his cronies to suspend regulatory scrutiny of SpaceX and Tesla. Musk depends on the goodwill of the Xi regime in China to keep parts flowing for Tesla and to keep China open as a market for the cars. Musk needs the new extremely rightwing government of Argentina to remain friendly to the United States to maintain access to new lithium mines for Tesla batteries. And Musk infamously owes the Saudi royal family for funding his disastrous purchase of Twitter.

This level of entanglement with troublesome and oppressive foreign governments makes Musk a security risk to the United States whether inside or outside government, whether Trump or Harris runs the government.

The choice for America’s future could not be starker, especially when we contrast the roles, goals and personalities of the two highest-profile celebrities active this fall. Swift offers a serious and sincere opportunity for engagement. Musk offers snark and selfishness. Yet for some reason, too many people consider Musk, with his wealth, worthy of pontification on matters of public policy. Maybe it’s time we took Swift and her followers more seriously. The future is theirs.

• Siva Vaidhyanathan is a professor of media studies at the University of Virginia and the author of Antisocial Media: How Facebook Disconnects Us and Undermines Democracy