The nature of a lofty cause or ideology is to be self sustaining

Socialism still has large scale civilization. With the existence of huge swaths of power there will people who want to seize it. As an ideology the stakes are higher if it finds itself corrupted. Leadership positions are given a slight power and eventually that power will be abused. In a completely collectivized society that could mean absolute tyranny. And the argument that one could rise up to eliminate corrupt leaderships doesnt work. Classical liberalism thought they could remove corrupt government by having their own militia. But when their government became corrupt and turned to america. It couldnt be undone at all(or if it will be undone, it cant be considered with ease since it took so long). Though this isnt a problem with socialism admittedly. Most political ideologies are utopian in conception and just take the same components of society(workers and leaders) and mix and rearrange them. Every -ism will be "better" than the previous one and claim to solve issues and be a reaction to the previous one. The -ism will eventually collapse and restart the cycle. The solution then must be to kill civilization. That which continues this.