Forget about infra, we don't even have proper data at times
Until 2016 it was believed that total internal migration in India involves 4.5 crore people. Analysis of ticket booking data revealed that this number is closer to 9 crores, almost double of that!!
With such high amounts of migration this situation was basically a ticking bomb waiting to burst.
Many people who left...
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Mumbai last year in dire situation returned back in few months as most people couldn't get any means of income. Apparently changing names is easier than creating industry!
Mumbai is bursting at its seams now, it has got a suburban network that is better than anywhere in country (ABS on entire system with TMS on main network, along with AWS for protection) but it is proving inadequate, we have a dozen metro lines in construction simultaneously that aren't going to change the situation beyond a certain point which means overcrowding is here to stay. With the economic situation at the moment, most of these people will return again, economy will start opening up, people will let down their guard again, start a new wave and then be back to square one.

One man wonder is more of an outcome of turbulent days of independence, for the constitution was deliberately written with centre having far more power than state. It made sense then, as quite a few states tried to secede from India (junagadh and Nizam initially, later Punjab and Nagaland) but things aren't that bad now, yet we still have far too much power with centre.
Problem with this is, a fair chunk of money generated inside a state is used based on how centre wants it, leading to a situation where many states like MH, KA, TN, Goa etc wind up paying far more to centre than they receive, while the hindi belt states get far more than they give. UP for...
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instance receives 18% of money collected by centre, over 4 times more than MH, while bihar gets 9%, almost same as MH and GJ combined get. This means lesser funds available in places where there is strain on infrastructure due to migrants (thereby giving them a steadily declining quality of services over the years) while the northern states get to fritter money over freebies, name change and other unproductive activities!