people that otherwise couldn't afford it
Because for a person born and raised in America to be unable to afford Internet service (as well as a phone, vehicle, decent shelter, and food) is a shame. Millions of immigrants here — legal and even illegal ones — manage to not only do well for themselves, they are also able to support extended families back home. That's despite the culture shock, not knowing the predominant language very well, and — in many cases — dubious legal status.
But if you feel like continuing the failed "War on Poverty" for another fifty years — go ahead. Just don't force me at gunpoint (via the IRS, that is) to join you.