Good point. But Rand is a shrewd statesman. By him asking for a perfectly reasonable modification to a bill that he knows his swamp colleagues will oppose, Rand damages his swamp colleagues more than him simply voting against it would.

In this way, the public gets to observe the swamp rats trying to evade legitimate spending oversight measures; and that will naturally raise public suspicion, and invite [unwanted by the swamp] public attention, and scrutiny.

Good point. But Rand is a shrewd statesman. By him asking for a perfectly reasonable modification to a bill that he knows his swamp colleagues will reject, Rand damages his swamp colleagues more, than by him simply voting against it. In this way, the public gets to see the swamp rats try to evade legitimate spending oversight measures; which naturally raises suspicion, and invites [unwanted by the swamp] public attention, and scrutiny.