Maybe I am missing something here.
How is sitting on a chair for hours moving 20 gram pieces of wood every few minutes considered productive?
Unless one is CEO of a company, he is not productive? So, microsoft must be really stupid to pay all these people so much money, because they are unproductive!
Like India is always seeking approval from the west, is south India seeking approval from the north? There is nothing to be proven.
And even if south Indian people that you named are more productive, it does not in any way increase the status of south Indian people or Indian people as they are not going to share it with you or me. They did it for themselves, not for proving that south Indians are more productive.