They'll learn the bus/train routes and/or get a bicycle pretty quick.
I always find this particular argument horribly ironic on Slashdot, a site just fucking chock-full of commuters. I'll bet a good portion of the portion of the readership of this site which still has a job is driving more than an hour to reach it, and the biggest portion of those people live where there is no public transportation option which covers their entire route, even given a reasonable bicycle ride at the start.
I am all in favor of solving the public transportation problem in this country, but it's one which was deliberately created by the auto companies. We're not about to force them to fix it, and they couldn't afford to if they tried. We're going to have to pay for it.