I have noticed quite a bias in you for Migrants....
Did quota system achieve what is was put for and extended further?
Did Sindhis under their feudal lords flourist after quota system? answer is NO....
Waderas themselves don't want Sindhis to get education.
And by the way, what do you mean by migrants grabbing Karachi? Read Nehru-Liaquat pact before bullshitting here
https://en.wikipedia.org/wiki/Liaquat–Nehru_Pact
Migrants , after arriving in Karachi got empty homes and established themselves in those houses just like Hindus who migrated from Pakistan got hold on our houses left by our fore fathers....Two way street.
Do you know what role Migrants played in establishment of Pakistan? You owe your freedom to us.
We FREED you from British.
I also want Sindhis to get successful and have education but not at cost of my own community.