This whole idea of selecting caretaker is such an idiotic and short sighted one. After several runs, it will become impossible to find the right people to be caretakers. If lets say PTI wins significantly in Punjab, Dr. Askari too will become controversial for PMLN.
The better alternative is to make Election Commission independent. After a certain date on end of term, the EC takes up all admin powers and the sitting government can continue as caretaker as it has no admin powers. This way institutions of parliament and EC will be created.
Right now, the system does not empower institutions but its at disposal of whims of the individuals. And what better could you have expected from PPP and PMLN who drafted these changes in 18th amendment!!?