To answer your question we have to look further than just who is "richer" - define "richer".
In the USA, people save very little outside their retirement savings. The culture is different - here consumerism is rampant and spending your excess money is the norm. In India saving is more common.
But back on topic, the better term is "disposable income". After paying for the expenses for the necessities who will have more "disposable income".
Also you have to look at which city you are living in - let's compare Bangalore and Boston resident. also, I guess your numbers are not for "take home salary" but you have to pay taxes - right?
If you work in Bangalore and get paid 2L a month, then 25% goes in taxes (50K gone). Then say ~50K goes in rent (correct me if I am wrong in my assessments - I have not lived in Bangalore in 15 years)? If you own a car, then maintenance, insurance and gas will be ~25K a month? Food (home and eating out) will be 10K a month? Utilities - Entertainment (cable TV), electricity, internet, telephone, cellphone etc put together is another 10K a month? You will keep a maid, a driver maybe? Together another 15K a month? Clothes, shopping miscellaneous expenses etc 10K a month? So, all put together you are looking at 1.2L a month - so a net "disposable income" of 30K a month - equivalent to $600.
Now look at a Boston resident with $6K as salary.
28% goes in taxes - leaving $4320 net salary. Add Health insurance at $220 a month. Rent is say $1400 a month. Own a car - $500 a month. with gas and insurance etc. Food and eating out is $500 a month. Utilities would be $300 a month. Miscellaneous is say another $500 a month. Total of $3420 - leaving $900 as disposable income.
Did that answer your question?