The "Remove 2 for 1" rule is crude for sure but it is necessary to force self-interested public servants into cutting back on useless spending because they have no incentive to do so otherwise.
Some departments and agencies have gotten so bloated that this rule is the only way they can be fixed from the inside. An example being Housing and Urban Development which has received terrible audit reports for years.
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Every bit helps but you are right. Trump has refused to touch those things so he will never be "the great deregulator" but considering how bankrolled every politician in Washington is by the AARP, I don't think that there will ever be a president who can fix those programs before one of them eventually runs out of money.