Dear Tushank,
The salary for CXOs in a startup is directly calculated from the growth it promises. Recently an Ecom was looking for a product head at 50 Lacs PA. The growth promised to the Investors, is what the new role has to deliver.
Infact to be honest, the person drawing that amount will deliver a lot more, as the investor takes few X of the capital invested.
Hope that answers your question. If you are interested to research more on Startup salaries, then Buffer App is the best place to start.
Open Salaries and
Equity Formula
Hope this helps !