Regarding the Google memo, Google makes itself less competitive by prioritizing “diversity” over its business self-interest and profits.
As a result, by becoming thus less competitive, it will shrink relative to the scenario in which it hired based on merit.
The more it shrinks, the less it will be able to afford to hire incompetents just because they are of the right race or sex.
Further, as it shrinks, the number of workers it employs will decrease.
And that includes the workers belonging to the alleged victim groups.
No worries, however: some new and less irrational entrepreneur will gladly take the Google’s market share.