yes it does, if a person from a eu country visited poland and fell ill he could access the polish medical system for free.
No, he couldn't. He would have to prove that he has health insurance from his own country first. You cannot get the card that proves it (the EHIC / EKUZ in Polish) without having health insurance. For instance, if you don't pay for health insurance in Germany, you can't get the card.
a 2% levy based on taxable income is charge in some countries, people on whom are unemployed or retired are exempt..
Yes, and in others, the charges are quite high. Again, it's a real struggle to see why I should pay 9% of my income for healthcare simply so someone that has never contributed to the Polish social insurance system (you) can benefit.
the bottom line is that a self funded retiree returning to Poland is of great economic benefit to the country, he should be treated the same as his counterpart here.
I think you overstate the benefits. That person also has potentially very expensive health care to pay for, particularly if they require long term treatment.