Then those with larger account balances will increase at the same rate and flag all those accounts, decreasing their reputation. As @trogdor mentioned above, things are being done to help with this issue. Dan had a hardfork ready to go with his solution, but the community didn't like it, so it was rejected. Something will come up to solve this, I think. This is the beauty of game theory: new ideas always evolve to combat the existing ones.