The US ruling class periodically senses "blood in the water", and sets things up for a "feeding frenzy" (money and/or power), where a small, well-connected elite engorge themselves on hapless victims.
Iraq and Afghanistan provided such opportunities during my lifetime, and before that, it was the Vietnam war, and history has plenty more examples farther back.
In this most recent feeding frenzy, it appears to me, that the victims are some important (maybe critical) parts of the US itself. A sort of auto-cannibalism, if you will.