(this is a sarcastic post meant to highlight the absurdity of some of the “greater good” rhetoric we’ve been hearing, especially around leaving vulnerable populations like disabled people behind in case of revolution, basically accelerationism)
No one is “allowed” to take power. There is a constant struggle for it. Leftists have been losing that struggle because they don’t get enough votes.
Dems move right because it is a politician’s job to cater to their constituents regardless of their ideology. If there are fewer leftist constituents then the politicians move right.