[shevy-java]

Well - greed explains this though. Plus, you can also run fake-policies - the USA has done so numerous times before. Flip-Flopping happens in both parties there.

[graeme]

Human greed has existed as long as humans have existed.

"Grr greed" is an easy answer that's popular these days but by itself it can't explain a change as it's a constant factor in us as a species.