I'm not saying it wouldn't help, but in the last few years the NHS (in England and thus increases come to Wales too) has seen large rises and yet improvements don't seem to happen.
Makes me think the issues are not directly money related and more connected to how the thing is managed. Thats the impression I get from speaking to friends in the NHS too.
Seems that both Labour and Conservatives are on board with reform of the NHS now too which says a lot given what a political football it is.