A tank off of Amazon? Damn, maybe this is where the military gets all their tanks. No wonder why we have so much debt to pay off. They were too busy buying tanks.
even though you are joking I'm going to reply seriously.
The US govt. makes its own military vehicles, and even exports them. Making military vehicles actually helps the economy. It got us out of the Great Depression, world war 2 created jobs in the manufacture of planes and stuff for tons of Americans.
And also the majority of the US' debt is owed to American citizens.