The senate might almost be serving the opposite purpose these days: if most states have a stereotypical population breakdown like Pennsylvania, with urban cores outnumbering large rural areas, then the senate is in effect gerrymandered to favor urban voters. (I tend to think of the original intent of the senate to be a geographical/regional balance rather than an urban-vs-agrarian balance.)

I do agree that Pennsylvania might have gone a little overboard, but I think the solution should be closer to the actual vote without necessarily giving the urban areas a majority.

On farm subsidies: if it's any consolation, small farmers in Pennsylvania are currently getting massive subsidies - from the gas companies if not the government. :)