Both Scandals were prompted by labor disputes.
In 1919 the Black Sox players felt exploited and underpaid. It was primarily for these reasons they became easy targets by gamblers.
It was after the players strike of 1994 and the cancellation of the World Series that many baseball fans lost interest in the game. In danger of permanently losing it's fan base, baseball had to bring fans back to the ballpark. This was primarily accomplished by power hitters and homeruns, brought about by the players use of performance enhancing drugs.
Both Scandals were ignored by the baseball establishment.
Wether it was an attempt to avoid negative publicity or that baseball was in fear of losing money or perhaps a combination of both, the baseball establishment failed to respond to these crises in a timely manner.