Remember all those (exactly) 1 million dollar "donations" all those CEOs were giving to Trump's inaugural campaign? Those weren't donations, they were bribes and kissing of the ring. Pledge loyalty (and pay a small fee) and the government will work for you.
They don't trust him, but they don't want to get on his bad side. They're basically hoping that he'll ignore them or forget about them, and focus his attention on his other enemies.