Communism

I agree that communism is not a dictatorship, but it does require one to get everyone in line.

I think the best way is a very well controlled capitalism with good taxation on the rich class to ensure you have a great and prosper economy and use the money for a great socialistic welfare system on top of that. Basically what the northwest European countries have. Add rules like "richest person should not surpass 10x the poorest person in wealth" or something oversimplified like that.