https://en.wikipedia.org/wiki/Ratchet_effect

The ratchet effect is a concept in sociology and economics illustrating the difficulty with reversing a course of action once a specific thing has occurred, analogous with the mechanical ratchet that allows movement in one direction and seizes or tightens in the opposite.

Republicans push us in one direction, weak/complacent democrats don't fight back.

It's part of the two-pronged strategy, and why anyone who supports establishment democrats is tacitly supporting republican policies.

We really needed Bernie in 2016, but it shows where liberals' priorities lie. They become conservative as soon as their wealth is threatened.