What does it even mean to say that the state department is by definition political? There are political appointees, but the overwhelming majority of the state department is career foreign service or career civil service, which are apolitical. The same is true for USAID.
None of what you're saying makes any sense or has any relation to reality.
Marco Rubio (head of the state department) stated that they refused to audited. So did other congressmen. https://x.com/cspan/status/1886473339201360210
Do you disagree with what he says in the above video? They denied to be audited. The US in USAID stands for United States. Can we not ask what they spend the money on?
USAID was not created by congress. It was created by executive order 10973 by JFK. It can be undone by executive order. It's function can be rolled into the state department.
Also, Congress codified it as an independent agency in 1998. So.. that last part isn't true either. This stuff isn't hard to look up.
This stuff isn't hard to look up, but feel free to send an explicit link explaining why they can spend money and never have to answer any questions about what they are spending it on. Some of the alleged things that they spent the money on are ridiculous (not going to repeat them here).