I propose that, what with unicorns numbering one-third of the population in many areas, we simply cut to the chase by declaring that our firms will henceforth only hire demigod alicorn princesses. This will convey exactly the desired degree of hyperbolic rarity we intend.

The fact that there are only four known alicorn princesses ever isn't going to stop every firm insisting that each and every candidate hoping to interview provide strong evidence that he or she is one of the four alicorn princesses.