Because the people in charge of straightjackets want this.

If you're a piece of shit corrupt politician, he's a godsend. He's loud and distracting, corrupt as hell, doesn't give a fuck about any sort of ethics as long as he's getting his, plus he's dumb as shit and has a massive ego. The amount of mid-level corruption you can get away with while everyone's looking at Trump has to be insane, and all you have to do is chuck him a wad of cash or tell him he's great once or twice a year.

They're going to prop him up for as long as they can, make out like bandits and when his cholesterol finally catches up to him and he dies, they'll all scuttle off back into the woodwork and in ten years you won't be able to find anyone who admits to having supported him at all.

And risk losing the power given to them by Trump?

Because, much like the great philosopher Dexter Holland once opined, shit is fucked up.

There is no legal process that can be invoked by the people who want to straight jacket him.

Hes rich

Because he's secretly gay. A straightjacket would be ineffective.

Because apparently people just keep allowing him to have power through apparent fear I guess although it amazes me that anyone could fear that pathetic lump