but, just sayin', shouldn't we use the Medicare payroll tax witholdings to pay for medicare?

result in any funding being available for a program other than medicare?

In fact, it's one of the fastest growing portions of the US budget. It's one reason that curtailing the increase in health care expenses would help the projected budget deficit. (And, no, this was not part of the health care law a few years back. Intentionally so.)

Medicare requires a hefty chunk of $ every year to avoid mandated cuts (the mandate dates from 2002 or before, and has never been applied).

If you increased dedicated funds going to Medicare then, in principle, you could reduce the amount of money needed to fund the "Medicare gap"--the difference between dedicated income and budgeted expenses.

close that loop-hole, I would suggest a far more substantial fix that would fund a lot of stuff for a long time ...

How about removing the cap on Medicare payroll tax and apply it, at a lower rate, to ALL income whether earned or passive.

The formulation being floated will affect the true small business owners (like my wife, who is struggling with a one person consultancy shop) far more than the "fake" small business owners, earning millions.

So if your gonna take from S-corps, remove the cap.