"Success" is a relative term. We have adhered to a socialist model of democracy and it's working well, IMO. Life in America is not easy either. The "privatise everything" policy has worked only in a limited way.
Please note the differences - America has land, a lot of it. We have about a quarter of the world's population and only 2.5% of the land mass. We lack the resources that the US government has. So the government has to preserve whatever resources it has.