And then 90% of the Wizengamot was arrested by Harry and his Aurors. Because they were paid to pass the law, nobody bothered to read it fully to know every of its details. As it turned out, the law not only made receiving bribes illegal, but made it possible to prosecute you if you received any bribe in the last five years. Everyone who received a bribe in the past lost their position and were sent to Azkaban.