I think we need a law that states cashless (in-person) PoS systems may only exist iff the cashless "currency" used is void of any fees (both for buyer and selle

I think we need a law that states cashless (in-person) PoS systems may only exist iff the cashless "currency" used is void of any fees (both for buyer and seller). Not to be confused with current systems that are cash or card.