The famous examples of match fixing in history- the BlackSox baseball scandal of 1919, the New York college basketball scandal of the 1950s or the English football match fixing of the early 1960s all involved players on either no pay or low pay.
Clubs such as the Boston Red Sox and Detroit Tigers did not take on their first black players until most other clubs had long utilized black players and clubs like the Dodgers and Giants were well on the way to their long run equilibrium number.