I feel like the US is in a position to simply have some police deliberately fall for these scams, then wire over the $25k as the scammer instructs, then trace that money as far as the indian border, then demand the indian government repay it.
The indian government can continue tracing and find the scammer to get their money back (hard), or just shut down the call centers (easier).
Yes, I know this isn't the way international disputes work right now. But I think the US is in a position to make demands like this, with the threat that US borders will be closed to indian nationals, goods and investment unless india pays up.
Repeat however many times are necessary to solve the problem.
The indian government can continue tracing and find the scammer to get their money back (hard), or just shut down the call centers (easier).
Yes, I know this isn't the way international disputes work right now. But I think the US is in a position to make demands like this, with the threat that US borders will be closed to indian nationals, goods and investment unless india pays up.
Repeat however many times are necessary to solve the problem.