Future generations will curse us.
Since the government supposedly represents the people who vote it in, we will be blamed for perpetually returning sycophants to office who play sweet music for our ears, and who obediently refuse to do anything responsible that might cause us pain.
If you are from a reliably Republican district, you will hear that your taxes will never be raised for any reason. If you are from a liberal Democratic one, your representative will make sure that entitlement programs--and any other government largess that might tickle your fancy--will remain well funded into eternity.
In theory, the Tea Party movement has the right idea: Throw out all the corrupt, amoral pols and start over with a clean slate. Here's how it will go in practice: Americans have a hard time seeing past their own personal interest. If you tell them they're going to have to pony up and tighten belts to balance some theoretical deficit that they see as an abstract, they'll dump you. That's for some other guy to do, not them.
Also, don't forget that one man's pork is another man's essential project. Even Sarah Palin happily accepted funds for the Bridge to Nowhere until it became a political liability for someone with national aspirations.