Paul Krugman spells out the difference between the Ryan Medicare Plan and the Affordable Care Act:
“….the ACA [Affordable Care Act] is specifically designed to ensure that insurance is affordable, whereas Ryancare just hands out vouchers and washes its hands. Specifically, the ACA subsidy system (pdf) sets a maximum percentage of income that families are expected to pay for insurance, on a sliding scale that rises with income. To the extent that the actual cost of a minimum acceptable policy exceeds that percentage of income, subsidies make up the difference.
Ryancare, by contrast, provides a fixed sum — end of story. And because this fixed sum would not grow with rising health care costs, it’s almost guaranteed to fall far short of the actual cost of insurance.
This is also why Ryancare is NOT premium support; it’s a voucher system. No matter how much they say it isn’t, that’s exactly what it is.”