I think tax breaks are different from direct funding, the same for payment for specific services at a reasonable price. For example the UK exempts virtually all religious bodies from tax, and its on the same basis as a huge range of things (e.g. amateur sports, equality and diversity, community facilities...). I would not consider that state mandated payment for services.

I do not know enough about the concordat or how Polish pensions work to comment on those. I would be interested but there does not seem to be a lot of information online (e.g. the wikipedia article is a stub)