> Indian police is actually able to do quite the lot of pressure when terrorism is involved
Because terrorism related stuff falls under the Indian equivalent of Homeland Security, even if it's local PD triaging.
> Americans like Scammer Payback report giant scam callcenters with credible evidence, they take well over a year to raid it
Raids that are not National Security related need coordination between the Federal Government and State Government in India. The scamming call centers are located in a state called West Bengal. West Bengal is ruled by a regional opposition party called the TMC. West Bengal removed it's consent for Federal Police in India to raid without the consent of West Bengal Police. This ended up in the Supreme Court for a couple years [0].
On top of that, the scamming call centers are closely tied to the ruling party machinery in that state, as you need to get a license from the state government to operate a call center, and these kinds of call centers will often be donating to local political parties to look the other way.
Watch Jamtara on Netflix. It's a good overview on the economics of scam calls in India.
[0] - https://www.deccanherald.com/india/cbi-independent-legal-ent...