What do you mean?
The budget is voted on by Congress literally every single year. The mechanism absolutely exists. The political consensus to do so is harder to achieve, but that's only when people actually don't universally agree change is needed (or how specifically to change it).
A formal budget hasn't been voted on and passed by Congress in decades.
You're likely thinking of "continuing resolutions" and omnibus bills, neither of which are "budgets" by Congress's own defintions but function similarly:
The first - a continuing resolution - just continues spending as is, no chance to change or cut.
The second - an omnibus bill - is a big conglomoration of requests and projects with minimal chances to change things.
You are 100% correct on the lack of political will to be able to change things. Frankly, I believe that a) too many people have their hands in the pot or b) they fundraise off the real/perceived problems, so the motivation to fix anything is minimal.
Ref: https://www.pewresearch.org/short-reads/2025/10/01/congress-...
Certainly seems to be.
Unless a given industry is too big too fail, or requires millions to billions in corporate welfare, or where bankruptcy voids responsibility of ecological disasters and socializes the damage. Since those things have obviously never happened.