The Evolution of FSI in Mumbai

I often tell my friends that it's easier for me to buy a home in New Jersey than in Mumbai. It doesn't make sense, but whenever I talk to my friends about FSI, we all have the same complaints about scarcity of land and the prices are so high. If you simply tax a value that is created by that, can you give me a sense of how other metropolises through the ages have evolved to grow up? With these services evolving with them. Does it have something to do with what stage of economic growth a country is at? Yeah, so let me get to that in a sort of a by way. And why Mumbai got on into this negative equilibrium