Because they know what awaits them if they try to leave the "chosen path" (a path that also helps them remain billionaires, so not that difficult a moral compromise to make). See Joseph Nacchio [1]:
> Joseph P. Nacchio is an American executive who was chairman of the board and chief executive officer of Qwest Communications International from 1997 to 2002. Nacchio was convicted of insider trading during his time heading Qwest. He claimed in court, with documentation, that his was the only company to demand legal authority for surreptitious mass surveillance demanded by the NSA which began prior to the 11 September 2001 attacks.
> Joseph P. Nacchio is an American executive who was chairman of the board and chief executive officer of Qwest Communications International from 1997 to 2002. Nacchio was convicted of insider trading during his time heading Qwest. He claimed in court, with documentation, that his was the only company to demand legal authority for surreptitious mass surveillance demanded by the NSA which began prior to the 11 September 2001 attacks.
[1] https://en.wikipedia.org/wiki/Joseph_Nacchio