Whatever big shots are hiding for their convenience. There is some reality in Raj Thackeray's opinion. Its only that he didn't express it intelligently. Typical Marathi Oops.
Migrants coming to Mumbai must provide 'Value Addition' to the city, not vice versa.
If they can't add value, city like Mumbai can't take them. Poor and illiterate people are enough in Maharashtra who can fill that gap. There is no need to import poor people from states which vowed never to develop.
The reality that people of other states are always providing for under developed states Bihar, UP, etc. is sickening. They have to do something for themselves. Not only politicians there, people from all other fields must do something for than being parasitic on other states.
The reality that a great percent of internal Maharashtra is extremely poor can't be chided away.
And the reality that people from these downgraded states are biggest role players in Indian politics is another fact to act against.
Further, being a Mumbaikar and visted southern states, all those having fun of southern states can eat their south dishes all over India and have fun of south. But you have to learn from those states - their combined GDP will be higher than that of same small developed countries.