The Congressional Budget Office on the country's spending habits:
Although it is uncertain how high spending will be in any given future year, it is certain that if the growth of spending does not eventually slow down, at some point financing that spending will become infeasible. No spending path can grow faster than the economy forever; at some point, the costs will exceed the resources than can be extracted from the economy, and changes in policy will have to be made.
CQ.com on the costs of the wars:
The Congressional Research Service reported Monday that the average monthly cost of the conflicts in Iraq and Afghanistan had been clocked at $12 billion. Two years ago, the CRS put the monthly figure at $7.7 billion.
It's called "unsustainable."