Mumbai progressed to become the financial capital of India mainly due to the MIGRANTS from all over InDIAN states. There are many PARSI's Gujaratis' Sindhis, Punjabis who migrated during partition and settled down in MUMBAI with family and contributed to the Mumbai progress.
But the city have a limit to absorb. it is now bulging with population. Had anybody criticising mumbai ever seen the MUMBAI CENTRAL, CST stations when a Train from other states land. its a huge number of people pouring into mumbai from differnt parts of country looking for jobs due to lack for opportunities in their states.
It already absorbed Five times more than the population it can accomodate.
need to control this situation, else the increase in more population in mumbai will result many not getting livelihood, and end up in the hands of unwanted anti social elements.