A short list of problems:
1) Illiteracy
2) Population
3) Poverty (India has more poor than Pakistan's population)
4) It's moth-eaten infrastructure
5) Its border disputes with Pakistan and China
6) It's areas like Andhra Pradesh. I heard government's writ doesn't prevail over it.
7) Maoist rebels
8) Social problems (female infanticide, dowry etc.)
9) Religious Extremism (India has diverse communities. And people won't believe me when I tell them that India is more prone to religious extremism than Pakistan. RSS is enough to create hell for them!)
10) Corruption
11) Environmental pollution
12) Energy and power
13) Low per capita income
14) Brain-drain
15) Natural hazards (earthquake, tsunamis etc.)
16) Lack of safe drinking water
17) Health (specially HIV)
18) Foreign Debts
19) Unemployment
and many more that I can't recall right now...
India has some very heinous problems that Pakistan does not have. Pakistan has the potential to grow. Ayub exploited it right, had he worked on 'trickle-down-effect' we would have crossed India by now.
For India, I would like to wait and see it becoming a super-power in my life time
Regards,