Cutting budgets is really hard. It takes ongoing commitment from the top.
Presidents come and go. But the ones heading government agencies are "ongoing."
I remember a very senior exec. with a tough reputation. He wanted budget staff, to show him where to cut. He said "give me the ammo, I'll fire it."
Rumors went around, that he couldn't read. No shite, just like Trump. When he retired he wrote his autobiography, traveled, rached in his native Colorado. Illiterate, he was NOT.
He was a disruptor, par excellence.