Honestly paying 3% to make sure your shit gets approved sounds great. It's kind of like dealing with a hooker instead of a wife -- at least you know exactly what it's going to cost after you leave.
More corruption at this point would almost be a good thing. As things stand there's basically no personal incentive for inspectors to actually approve projects.
It was 3% as long as you were part of the conspirator and make it extra painful to everybody else. What the conspirators wanted out of this was to control the number of players so they could limit supply and control rates. Paying people to do nothing while you wait for the permits is how you bankrupt small contractors.
More corruption at this point would almost be a good thing. As things stand there's basically no personal incentive for inspectors to actually approve projects.