Elon Musk made a clear promise after Donald Trump decided to put him in charge of making the government more efficient.

“It’s not going to be some sort of backroom secret thing,” Musk said last year. “It will be as transparent as possible,” maybe even streamed live online. It hasn’t worked out that way so far.

In the three weeks since the Republican president has been back in the White House, Musk has rapidly burrowed deep into federal agencies while avoiding public scrutiny of his work. He has not answered questions from journalists or attended any hearings with lawmakers. Staff members for his so-called Department of Government Efficiency, or DOGE, have sidelined career officials around Washington.

It is a profound challenge not only to business-as-usual within the federal government, which Trump campaigned on disrupting, but to concepts of consensus and transparency that are foundational in a democratic system. Musk describes himself as “White House tech support,” and he has embedded himself in an unorthodox administration where there are no discernible limits on his influence.

Donald K. Sherman, executive director of Citizens for Responsibility and Ethics in Washington, said Trump has allowed Musk to “exert unprecedented power and authority over government systems” with “maximal secrecy and little-to-no accountability.”

The White House insisted that DOGE is “extremely transparent” and shared examples of its work so far, such as canceling contracts and ending leases for underused buildings. House Republicans said the Trump administration also discovered that Social Security benefits were being paid to a dozen people listed as 150 years old.

“We’re going to find billions, hundreds of billions of dollars of fraud and abuse and, you know, the people elected me on that,” Trump said in a Fox News interview to be aired along with the Super Bowl on Sunday. He described Musk as “terrific” and said he would soon focus on the Department of Defense, the country’s largest government agency.

That is true, at least judging by Musk’s social media, where no thought appears to be suppressed. His X account is a flood of internet memes, attacks on critics and professions of loyalty to the president. He has made clear the grand scope of his ambitions, talking in existential terms about the need to reverse the federal deficit, cut government spending and roll back progressive programs.

“This administration has one chance for major reform that may never come again,” he posted on Saturday. “It’s now or never.”

Musk is used to doing things his own way. The world’s richest person, he became wealthy with the online payment service PayPal, then took over the electric car manufacturer Tesla and founded the rocket company SpaceX. More recently, he bought Twitter and rebranded it as X, cutting jobs and remaking its culture.