I was actually surprised to hear that 1 in 10 bills become law. I would have guessed that number to be lower. I agree that besides ideological differences between the parties, a main hurdle to passing legislation is the complexity of the solutions needed to solve modern problems. With more complex legislation, it increases the chances of consequences contrary to the original intention of the bill. For this reason, it is critical that all bills are rigorously scrutinized, and independent experts in a given field are relied on to craft the right solutions.