Why India government does not solve corruption?

[Fli]

I read it several times that there is significant corruption in India and following article seems quite terrible example:
https://interactive.aljazeera.com/aje/2017/parched-for-price/index.html

I am curious why people in india does not vote for politics who will solve these issues. Or why current politics do not solve them?

I guess that there is large amount of problems in india so they can not solve everything quickly.