Socialism really would never work without repression, they would need to take from the most rich and might need force, so people will not accept the new system might cause real problems, so it will need more repression
This why big revolutions always end up with repressive regimes, even the French Revolution (that was not socialist at all)
And when you have an authoritarian regime in power they will want to remain in power, the original goals of the revolution will be lost and the new regime always think about itself first. So you can’t control what this regime will find acceptable or not.
The democracy needs concessions, needs to accept in parts the other side, this why Nordic countries have a better social equality and a very capitalist oil extraction

