Marathi Regionalism

I dont understand why people of Uttar Pradesh especially Eastern UP migrate exclusively to Mumbai. Mumbai has nothing new to offer every year it gets drowned in floods.
Why dont we explore so many global destinations available Middle East, Europe, North America, South America or Australia.
I would especially urge the enterprising youth of Uttar Pradesh to migrate to Australia which has huge land bigger than whole of India with a population of only 2 crore. Australia has a very good education & there are very few immigrants as of now. Uttar Pradeshis should explore new business & job opportunities in Australia & make that country the land of opportunities like America is today.