@NinjaAnalyst
While I agree that 2L PM is technically enough for a couple to live comfortably in BLR, I think one should look into the following.
1, How often do you update your gadgets, car, bike, appliances, etc?
2. How do you plan for emergencies?
3. How would you plan for one-time expenses like the school's initial down payment?
Everyone likes to upgrade their lifestyle, continuously. A Tata Nexon would make you feel like you are driving an average car in a few years, Same with other material things in life.
But the magic word is ENOUGH, what is enough for you? Are you able to control your urge to buy that new fancy iPhone? and so on.
So the bottom line is – No money is "actually" enough, if you don't regulate the outflow of your money. Greed and material addictions will empty your pocket sooner than you imagine.