Tell you what Bose if I was hardly fit to go solo when I started instructing it beggars the question what use is a freshly minted PPL.
I do agree that the current system is not perfect, but blaming low hours instructors isn't the way forward. I wasn't perfect as an instructor when I first started out but would like to think once I had some time under my belt that my students got value for money.
You hit the nail on the head when you say that career professional instructors need a decent salary, I would consider instructing again at some point but who on earth is going to pay 50K a year and thats just to match a SFO salary!
The only instructing that might come near the salary required would be CPL/IR and thats not bringing the experienced guy to the PPL student.