Its shocking, it goes right down to amateur level.
I was an amateur as a kid/teenager, fought at a good level and won plenty of cups. I can say for certain there's about 5 fights I clearly won easily and got robbed because the owners of gyms or family were friendly with the organisers and officials.
My nephew is boxing now and got badly robbed in a BoxCup final last year basically because the kid he really beat had already been chosen to go abroad to represent the country, so they didn't want him to lose a domestic tournament right before.
Disgraceful sport at times, right down to kids level. Imagine robbing 13 year olds at tournaments because of boxing politics.