Our only hope for changing that is to either A: Overthrow the Government (which is extremely unlikely because not enough people are determined enough to commit to that level of involvement/action) or B: Start playing a more active roll in day to day politics as voters. We need to as citizens start staying on top of all the legislation our representatives are involved in and make our will known and if they don't follow we vote them out. Unfortunately in our apathetic lazy society I doubt enough are determined enough to commit to even that level of involvement/action. Although option B: could work if we stayed committed to it long enough. It would likely take at least a generation because the corruption runs that deep.
The only hopeful news is that the public seems to be waking up at least to some small degree. A recent Gallup poll has revealed for the first time ever in the History of Gallup polls that the US Congress is the least trusted organization...ever. Also that the view is held equally by republicans, democrats and independents.
Hempkat your right that people need to get out and vote. However folks need more options. Unfortunately in the USA it requires a shit load of cash to get elected. Independents are the answer if they can get the publicity. USA needs high profile independent people sitting in the house who will ask the hard questions and not vote according to party dogma. Wishful thinking i know but possible. You dont need to control the house, you just need the balance of power.