Nobody seems to care. I guess its because, without that spending, America would be a third-world country by now.
EDIT: you can't discuss America's illegal wars from the perspective of the innocent victims. This will get you downvotes - nobody likes to think of their military as anything less than 100% honourable and invulnerable to such error. Nobody wants to know about the maimed kids and utterly evil destruction of civilisation at the hands of America's Thug Warrior Class... You can't discuss America's illegal wars from the perspective of the cost to Americans - nobody likes to think what those $Trillions could have done, to improve American society - and there is much it could have done (e.g. Healthcare, Skid Row, colony on Mars, etc.). So, how can we get Americans to see the idiocy of their military-industrial-pharmaceutical-complex? What methods, perhaps extreme, might gain their decadent attention to the issue of their out of control state? One wonders ..