You can look at how German doctors viewed their situation over the past thirty years. At some point around 2005, some international HR-medical folks arrived and began to recruit German doctors. In a period of 18 months, they took 5,000 German doctors outside of the country for public/private service in other countries (Australia, US, Norway, etc). It made a fairly big dent in public healthcare....requiring the Germans to go and recruit outside of the country, and to increase the pay-situation.
Same deal with German nurses. They wake up in their mid-30s to realize the pay will never get much better, and find that various other countries will offer greatly improved wage situations.
Canada loses many doctors each year to the U.S. because of our Stalinist health care system that prohibits private hospitals. Those who are either grossly underpaid in their specialties, or who no longer want to work in a system where patients have to wait months for operations while operating rooms sit idle due to government rationing of health care dollars. Bernie Sanders doesnt just want a public health care system. He wants to abolish private health care, so that all but the super rich will have to wait in Soviet bread lines for a knee replacement.