The establishment is capitalist.
The wealthy and powerful own the media.
A fairer system of socialism is not in their interests and so they actively undermine it.
In Scandinavia and the UK democratic socialism has worked very successfully. Our wonderful NHS is the result of it.
What happens when a socialist government gets in power is that the capitalists withdraw investment and actively undermine the economy. They engineer it failing.
The establishment is made up of wealthy, powerful individuals. They want a system that favours them and pours wealth into their pockets. They do not want a fairer system that looks after ordinary people or the poor. As they own the media they pour out a stream of propaganda to say that fairer systems do not operate.
It is extremely hard for Socialism to flourish when the money markets and media undermine it.