As far as constitutional protections go, Indians have a right to privacy which has been held up in the courts as recently as this year. This has been affirmed several times in the recent past. So, no, India does not have weak protections for its citizens.
Finally, India is a place where mere WhatsApp forwards on the basis of rumors or made up stories cause people to go out and riot. Communal violence can be instigated using such means. So such laws are essential to track down the perpetrators.
NSA, CIA also silently spy on Americans without much oversight in the name of security. In fact it is done at a mass scale.