So, what would it take to bring federal spending into line with plausible levels of revenue?

The CBO, the non-partisan agency charged with estimating the effects of legislation on government costs, has produced a long-term budget outlook in which Bush-era tax rates remain unchanged. Their conclusion is that over the next decade, “government revenues would remain at about 19 percent of GDP, near their historical averages.” That’s actually a bit higher than the historical average, but is within the bounds of reason.

A balanced budget based on 19 percent of GDP would mean $1.3 trillion in cuts over the next decade, or about $129 billion annually out of ever-increasing budgets averaging around $4.1 trillion. Note that these are not even absolute cuts, but trims from expected increases in spending…

Are our leaders willing and able to identify and cut just $25 billion in waste and excess out of more than $700 billion in non-defense discretionary spending? Is reducing the $714 billion the Department of Defense received in 2010 by a paltry $25 billion impossible? Can Medicare and Medicaid, two programs that are infamous for waste and fraud and cost well over $720 billion in 2010, find $35 billion in efficiences? The specific cuts should be open to negotiation, but the historical record shows that the available level of government revenue is fixed.