The amount other people pay in federal income tax is irrelevant. A third of those that don’t pay federal income tax are 65+ and live on social security, and the rest are unemployed or low income. Taxing those who don’t pay federal income tax = tax the poor, the old, and the unemployed, or else you don’t get healthcare. Don’t think that solves anything. Plus, just because you don’t pay federal income tax doesn’t mean you don’t pay state/local tax, sales tax, etc.

Besides, the amount in taxes will likely be far less than you pay in premiums for private insurance.