Ultimately, in the United States, government spending will come down because voters have made it clear that's what they want. Politicians will bemoan the austerity budgets, but most voters will see them in a different light.
Two out of three Americans believe decisions made by business leaders will do more to create jobs than decisions made by those in government. Cutting government spending is seen by voters as a way to free more resources for the private sector. In other words, austerity for the government leads to prosperity for the nation.