Get rid of the point system. Have them keep going till someone gives up or gets KO'd. This simultaneously makes the sport more interesting and will cut back on the corruption.
...and the strategy, and the focus on fitness and stamina, and the length of careers, and all amateur boxing, and the health of boxers, and the frequency of fights, and the likelihood of boxing remaining legal and sanctioned. Boxing has never been street fighting, and will never become such.