A classic failure to analyze. You totally miss the point. The part of the question you omit, is "as compared to what?" The very rich, who have amassed far more wealth than the rest of us should be paying accordingly, because they have amassed all the wealth to themselves and can afford it. It's called progressive taxation.
If the distribution of wealth were more equitable, then the rest of us would have more wealth and would pay more in taxes and be able to afford it.
If you think you're paying too little, then by all means provide healthcare to some homeless person.
I'd rather have a sane, equitable and far less costly health care system where we all share the burden and don't piss away our money on insurance and drug company profits and their excessive executive management salaries and bonuses and on a whole raft of bureaucrats working for insurance companies, insurance companies and health care providers whose job is to argue with another about who gets paid and how much, all of which is a total waste of money.
As for the janitor, given the subhuman minimum wages allowed in this country, I'm guessing I carried at least one janitor on my back -- but then half of the population isn't janitors, so I guess I carried more than my fair share.
Those rich guys are doing anything I need to thank them for. They are the ones getting the free ride.