Isn’t he basically saying it will be 4% per person on everything over 29k? Then, with a monopoly on funding for medical treatment, prices are negotiated down. The assumption is that Medicare has significantly less administrative cost than private insurance, and that eliminating profit for middle men can get a higher percentage of overall funding into actual patient treatment.
Its a terrible deal for me as someone with relatively high income and no out of pocket payments for health insurance, but probably good for a lot of people. I think he’ll probably lose on the all in tax burden of his platform. I’m unlikely to vote for Trump, but I’d sit out the election entirely if I think Bernie will cause me unreasonable financial hardship.