All Berned out.
Some places have made a half-and-half socialist and private system, work. Sweden did. But it was the private side that made it possible for the socialist side to keep humming. Systems like Venezuela will even eat their own seed corn.
Not really. It's working for the moment, but doesn't appear to be sustainable. Their average household debt has been rising steadily in the last 10 years. The high taxes needed to finance the government freebies is leaving them without enough disposable income to maintain their standard of living, and they keep borrowing more and more money to make up the difference.