Money squirreled away and gathering dust? Kept under the mattress?
Nonsense.
That money is invested, even if it is in banks, where money never 'sits' but is being loaned out for business, homes and the many other means of increasing money and its fluidity.

The stupid war and adventures in Afghanistan have cost almost $1 trillion so far. It and similar fiascos have wasted money that could have been used to support infrastructure and education.
I agree, that this is government waste to the nth degree; businesses large and small share the blame that the U. S. tries to act as policeman to the world. The culprits are ourselves because the majority approves of these actions.