Regarding social welfare I don't know anywhere that's doing it well enough to be considered a success. We should be able to provide housing and food for 100% of the people 100% of the time. For the edge cases that fall through mental health care should be provided for as long as necessary.
Not to want to seem like a downer on Europe the things I think they do exceptionally well includes investing in education, while they are also OK on the healthcare front (personally I'm a huge fan of the NHS model and would prefer if it was more widely adopted).
Housing is badly managed as is support for cash strapped entrepreneurs. The taxes nearly broke us when we started the last business in Berlin. In Ireland there is (the last time I checked) a possibility of a 2 year tax hiatus for new businesses in certain circumstances. In general these kind of incentives could do wonders for entrepreneurialism and the potential knock-on upward mobility it can bring.