E.g., USAID. It wasn't shut down, it was moved into the State Dept and the law clearly says the Secretary of State should be setting its direction. The current Secretary of State has said that Congress has been frustrated for decades at how USAID has been spending money without legislative direction. Well, no maybe that'll be fixedm
Trump's E.O. stopping payments only did so for those not required by existing legislation. A judge paused part of that e o., and I've heard nothing about the executive branch ignoring the judges order.
Does legislation specify how payment processing in the Dept of Treasury works, that is, that there be an office of payment processors that do nothing but click "ok" to the tune of over $250B in overpayments in 2023?
Now, maybe if he actually does try to completely disband the department of education then we will have a constitutional crisis if Congress doesn't pass a law authorizing that first.
Everything else so far seems to be just stirring the pot.