Do you think that the government of India is actually going to hire people to operate it and design the mechanics of verifying the calls against the list? Governments all over the world sub out technical work to folks like Verisign every day!
The article you post states that the government is going to maintain the list but it does not state that any government agency is going to match the telemarketers calls against the list. As a matter of fact, it states that THE TELEMARKETERS will have to verify against the list. And just because Teleblock works against a central database in the US, it doesn't mean that each telemarketer wouldn't use it against a local database in India.
Think about it...do you think that the corps of engineers actually trucked a bunch of dirt and supplies down to New Orleans after Katrina? NO! They subbed it all out to independent companies who specialize in it.
The article has a lot to do with inter-India phone calls, but nothing to do with the growing trend toward outsourcing telemarketing to India by US companies.
Good luck.