I don't know about state budget bills, but at the Federal level, the budget bill regularly gets unrelated stuff tacked on because it can't be filibustered in the Senate and there's a lot of political pressure to pass the bill.

As to fixing the underlying problem, I've been advocating for a benevolent dictatorship by a race of alien superbeings. It neatly avoids the political turmoil and will hopefully result in cheap, easy to use jetpack-based transportation.