It was the same problem with the Ontario Liberals, they are certainly well past their best before date. The issue is credible alternatives.
Another reason I like proportional representation. Perhaps more people would support alternatives if they had any chance of getting some influence.
After year long deliberations by panel composed of citizens representing a cross section of British Columbians, they recommended a STV system. We had two referendums on going to it and both times, the bone heads turned it down. Now they are back to bitching about the same things that are wrong with FPP. We had our chance and screwed it up because those in power are quite happy with the status quo.