Many of them are professional politicians that support their families with those paychecks. It is one thing to convince someone to take an extremist route when it keeps the money flowing, it is another thing altogether when that same action would leave them jobless.

It is difficult to get a man to understand something, when his salary depends on his not understanding it.

― Upton Sinclair

Wait, tell me again why it is so important to not pass a budget?

Do you really expect them to intentionally lose their job to piss off the opposition? We're talking about people who cling to power until they die in office.