Mass Migration to metro cities

The population boom over the years in India has seen its share of distress. The birth control policy scheme has also not been able to halt the rapid growth of population. Being under-developed nation, metro cities like Mumbai, Delhi, Bangalore, Kolkatta, Chennai has witnessed a mass migration, as small cities are unable to offer a sky-rocketing growth. 

Under these circumstances, do you think the government shouldn't restrict the developmental plans, employment generation and infrastructure plans to metro cities alone ?