The number of people in Congress today cannot "represent" hundreds of thousands or millions of people on average. Yet you can't increase the number of people in Congress, since even fewer people would have a say(only so many hours in a day...ahh, that rhymed).

So we're left with growing numbers of people, being represented by a smaller percentage of people, and those representatives listening to an even smaller group of people with large amounts of cash, which is required to run for office, which happens earlier every election cycle, leaving our representatives less time to represent us.

There's that, plus the overall trend of endless growth that politics requires(who votes for the person promising them less?), which will eventually completely toxify our habitat. Hey, what do you know, we found the toxic part!