In a two party system, no one wants to get rid of the loopholes. Those currently in power don't think their opponents will have the opportunity to use it, and those not in power want to use it later when they finally get to be in power.

Check out the two parties wanting the Line Item Veto thinking only their side would be able to use it yet horrified to see the other side use it.

https://en.wikipedia.org/wiki/Line-item_veto_in_the_United_S...