Pooling and Sharing of wealth makes everyone's wealth grow faster
Society, at least in the classic European model, works just the same: everyone (yes, I know, there are exceptions, that's not the point) pays their share into health insurance, LTD insurance, unemployment insurance, workplace accident insurance, pension systems and a ton of other social benefit systems. And everyone benefits from this kind of collective solidarity - our societies are far less combative (both in the literal and the proverbial sense) than the US are.