You could completely eliminate the military budget, and you still wouldn't solve our budgetary woes. By 2050, the cost of the major entitlement programs alone will consume 18 percent of GDP.
What's so special about 18 percent, you ask?
Historically speaking, total federal tax revenue generally bounces around between 17 and 19 percent of GDP -- regardless of the top marginal tax rate. Tax rates have been as high as 91 percent and as low as 28 percent and the amount of tax remained the same, between 17 and 19 percent of GDP.
This means that, no matter much you raise taxes or cut spending in other areas, the major entitlement programs will still consume the entire federal budget.