Elon Musk nonsense aside, a Department for Government Efficiency is honestly not a bad idea. Apparently, the military is tremendously wasteful, as are most other government departments. This could genuinely save some taxpayer money and free up funds for good things.
I am aware of the Government Accountability Office. I want something more powerful than that. The Government Accountability Office is a toothless organisation without the resources and power needed to really identify and defeat Government inefficiency.