Social Security is okay and easily fixed as it was fixed before if republicans  would cooperate again cause they hate this benefit. 

Medicare  is a lot harder to fix as generally, Medicare is available for younger people with disabilities and people with End Stage Renal Disease (permanent kidney failure requiring dialysis or transplant) and of course people age 65 or older all vulnerable people to illness.  

If Medicare was  turned into a voucher program. this would be great for insurance companies -- but it would require seniors to pay more. And with so many living on a fixed income, this could leave them with nowhere to turn.     A program like that wouldn’t be fair to seniors who rely on Medicare for their economic security.     It wouldn’t be Medicare at all.

Medicare is critical to the retirement security of millions. It is a promise we made nearly half a century ago

The answer would be ONE PAYER----medicare for all ---The basic rule is the larger the pool the less expensive the health care. Today we have 1,300 separate pools - separate health care plans - and that is why health care is so expensive; 700 pools would be more efficient and less expensive and one pool would be the least expensive. That's why single payer is the answer."

Nothing like common sense.