Why not? Is it somehow detrimental?

No. I just hadn't realized that I was expected to comment on your personal situation without knowing what it is.

Medicare tax is flat, i.e. the same 2.9% (divided on two halfs) for any income bracket.

Yes, but 2.9% of $150K is more than 2.9% of $75K. Similarly, there are many models for funding care from tax meaning it may depend on your tax bracket and various exemptions you may enjoy. So rather than guessing we need to look at the facts. The most visible fact is that care costs less per capita in a universal system. if you want to translate that to a belief that you will pay more, you must be relying on extra information. what is it?

Since you have raised it, presumably you have a viewpoint about your personal expectations. What is it?

I disagree with your way of counting it. Your assumption that everyone will pay less implies that some savings are going to appear in the system.

No, I'm working from the vigorously tested assertion that the cost per person is less in a universal system. Obviously I cannot be expected to comment on the effects on one person versus another. While you seem reluctant to say it clearly I get the feeling you expect to pay more. Can you please tell us why?

It is plain contradicted by practice (current budget proposals demand high deficit spending to cover additional health costs)

Nobody is saying that universal funding will magically prevent the rising cost of care. This is happening all over the world in every sort of system. However, it is very clear that the cost per capita is less in a universal system.

and by politics (no politician will assert/promote the idea that quality/quantity of medical service should decrease to provide for savings)

That relies on the assumption that quality is necessarily less in a universal system. Don't forget that you're already part of a universal system run by your wife's work. You may believe that quality is reduced as a result (choice of physician, coverage levels, exclusions, caps) but cannot safely assert that quality is necessarily worse in a larger universal system just because you abhor government.