Megan McArdle recommends:
Raise the Medicare tax by half a percentage point, and eliminate the tax-deductibiity of health insurance benefits for people making more than $150K a year in household income, $100K for singles. Then make the federal government the insurer of last resort. Any medical expenses more than 15% or 20% of household income, get picked up by Uncle Sam.
Ezra Klein recommends:
Medicare buy-in between 50 and 65. Medicaid expands up to 200 percent of poverty with the federal government funding the whole of the expansion. Revenue comes from a surtax on the wealthy.
And that's it. No cost controls. No delivery-system reforms. Nothing that makes the bill long or complex or unfamiliar.
My earlier thoughts are here.