Come on guys, lets be fair here: Indian lobby is active both due to sheer numbers and the fact that Indians in America are getting involved in the political system. With Pakistanis, its the newer generation just getting started with a smattering of older elected officials.
In democracy, Indians in America have every right to lobby the govt, I just hope that Paks can step it up. Pak-PAC used to be a good group along with others. Honestly we should follow the Israeli/Jewish model, as we are outnumbered.
One of the reasons a Pakistani/Muslim lobby can never be really strong in the US is because of the strong Jew lobby. A couple of legislators here and there is fine, but anything more than that seems like a pipe dream at the moment.