Unfortunately, The President cannot legally dock the salaries or wages on Congress or judges. He can veto appropriations, and wait for bills that have 2/3 votes in both Houses to override. Might save a few (hundred billion) bucks that way.
No problem. Let them challenge it in court.
I think there might be room in the docket right after the trial for the illegal alien who murdered the first American lying in state under this EO...