PIMO doesn't really help. You could have the entire org be full of PIMO people and it would still exist and function.
I understand your point but I disagree. If like 50% were PIMO imagine the money that the org would not put the hands on and imagine how much less hours of field service would be wasted and boasted about. Imagine the decline on the number of elders and pioneers. And, the most important, these people wouldn't be hampered to talk to their PIMI friends and explain why they are "not so excited with the kingdom things" and all...
In the long term, the org would be forced or to change or to become a placebo.