My 2 cents:

• I think that saying was about democracy, not capitalism
• Bear in mind that US is a capitalist lunapark. Most developed countries understood that social policies are absolutely necessary for people, even though we could call those countries a "capitalist country" or countries "based on capitalism". Just saying that don't take what's happenning in the US as a base because it's not
• If we're about to start to brainstorm about different systems - bear in mind that (not all but many) people are greedy, proud, jealous and sometimes assholes. And personally, I have a really hard time to design a system that would handle all those wonderful human treats in some decent way

P.S. I was born in socialist Czechoslovakia and its goal was noble but ... it's amazing to watch human greed and jealousy to take over a system like socialism