So, precisely how again do they suggest sites verify ages? It needs to at least be proof against a minor with an adult's "borrowed" credit card, and it can't require sites to violate the law. This isn't a technical problem here, it's completely independent of the technology. If these politicians want the problem solved, they need to spend some time thinking about how to solve the problem. And yes, "make someone else solve it" is a valid option but only if having the sites apply that solution by making the politicians the "someone else" is also a valid option.
The problem is, they don't care about kids seeing inappropriate material... Politicians are, after all, sexually abusing minors left and right in the UK.
Unemployment too high? You lost your job? What are we going to do about it? Sir, were you aware that your 11yr could possibly be addicted to Tentacled midget porn? You didn't even know that was a thing? Here are some shocking pictures. Go argue with your neighbors and leave us alone.