Over the years I've had reason to visit quite a few hospitals in various European countries, not as a patient. I'm not sure it's about the amount of funding, but possibly the manner of funding.
Two things that stand out is that waiting rooms are not crammed with people with stupidly minor ailments, and I was never aware of patients not keeping appointments.
I can recall an instance not so long ago in a major teaching hospital, I had arranged training on some equipment. This training required patients to be present. The people involved were me, a consultant surgeon, one senior nurse and one nursing assistant. Plus many products had been opened and prepared ready for use. A NHS consultant is paid between £75k and £130k. Not one patient out of five turned up, and only one called beforehand to cancel. We spent the morning yacking and drinking tea. The opened products were thrown in the bin as they were no longer sterile. I haven't worked it out but that afternoon cost thousands, with zero patient benefit. This story is not at all unusual. As it is perceived as "free", the NHS is appallingly abused and it's the people who really do need it that suffer.