What the process is actually for
Not to stop discounting. Discounting is a legitimate commercial tool and a business that never discounts is probably leaving deals on the table. The purpose is to make discounting visible, deliberate and paid for. Visible so you can see where margin goes. Deliberate so it is a decision rather than a reflex. Paid for so that each concession buys something.
Judged against that purpose, most approval processes fail for one of two reasons. They are too slow, so people route around them and the visibility disappears. Or they are purely bureaucratic, so the discount gets recorded but nothing is asked in return and the margin still leaves.