There are other legislative procedures that have been used to limit spending, even in this session of Congress. Let me give you just two examples. Bear with me, because this does get very complicated very quickly.
Each spring, Congress is supposed to pass a budget resolution, which lays out the general spending plan for the next year. (I’m ignoring out-year spending for the sake of simplicity, for those who might want to pick nits.) A budget resolution is like a blueprint – it doesn’t actually spend money, it just kind of lays out priorities, like that the government should spend $785 billion for all discretionary programs in 2004.
When the House and Senate debate the budget resolution, as a rule of thumb, you can anticipate that Democrats will try to increase spending, and Republicans will seek to decrease taxes (lower revenue). The Senate has a standing rule known as the Byrd Rule that makes it more difficult to include unrestrained spending increases or reckless revenue reductions (tax cuts), by subjecting those provisions to a 60-vote point of order. So that rule, more or less, deals with trying to make the budget resolution an instrument to cutting deficits (by limiting growth in entitlements and reduction of taxes).
As the 13 annual appropriations bills are considered later in the year, they must conform to the budget resolution – that is, they are expected to contain no more than $785 billion in discretionary spending (per the budget resolution). If a bill violates that budget cap, a point of order can kill provisions that increase spending beyond what was anticipated. That point of order may only be waived by 60 votes. The only exception to this is that emergency spending on national defense is subject to a 51-vote point of order.
There were countless partisan amendments voted down in the Senate this year that would have increased spending even further, but the requirement for 60 votes to waive the budget rules effectively killed those amendments.
[mixing apples and oranges] You may have heard that the Medicare bill came within one vote of being killed on a budget point of order. Budget-hawk critics of the bill called it too expensive, and since the bill spent more than was anticipated in the budget resolution, Senators had to muster 60 votes to kill that point of order. (Clarification - here I refer to mandatory spending, as opposed to appropriated (discretionary) spending)[/maao]
So, there are still methods used by Congress for limiting spending. But lets be frank - despite McCain’s obsesssion with pork, the current budget deficits are much more attributable to a soft economy than runaway spending.