Single Payer Opponents Say The Transition Process Would Be Too Difficult. But 10,000 People Do It Every Day. -- The Intercept

Opponents of single payer health care frequently claim that such a system might be wonderful in theory, but getting there would be too disruptive. Many Americans, the argument goes, have private health insurance coverage and the transition to a government plan would be jarring. ...
https://theintercept.com/2017/10/09/new-medicare-recipients-bernie-sanders-health-care/