The specific complaints are that funding in total hasn't kept up with inflation and population growth (so while, as promised, total funding hasn't decreased, real funding per capita has fallen). More generally there is a fear that the conservatives are trying to starve the beast and that the right faction of labour (which makes up the majority of the parliamentary party but not the shadow cabinet, because the leadership is chosen by the members) will support them and accept a fait accompli (even if there isn't one). The labour right, in the name of greater efficiency, broke the system up into smaller pieces and had them contract services to each other, which was a precursor to piecemeal privatisation in other nationalised industries . There have also been rising costs, which the government blames on the aging population and the doctors blame on lifestyle diseases (obesity and alcohol- and smoking-related problems, which add to the health service costs because the revenue from sin taxes passes into the general fund). There's also some who blame constant restructuring, because the cost of pissing about with the overall organisation every few years exceeds the most optimistic projections of savings before the next reorganisation. Also, costs have been shifted from other areas onto the health budget even if they have to use more expensive solutions because they have a duty of care where other government entities don't.