If this were universally the case, open source would not exist.
Greed is an innate human trait.
Those are not the same, but too many don't know what's the differrence.
BTW: Most of the world lives under state capitalism, not capitalism, not socialism, not any other form of economic system. The state has an unrestricted claim to any and all of your wealth.
European social democracies are among the top of the wealthiest countries in the world.
You seem to confuse capitalism with market economy. Germany's social market economy was conceived as an alternative to capitalism; a market economy with strong focus on unions and social fairness/justice. In other European countries is very similar.
Socialism core principles have always been égalite, solidarity and democracy. It's pretty silly to think that a highly hierarchical, unjust and undemocratic system has anything to do with Socialism.
Hint; it doesn't. It might say so on the marketing material ("Socialist Republic!") but that's just that - marketing to fool the numbnuts.
Just a thought.