> you could also see how an employer might try to keep a larger share But trying to keep a larger share means you lose out on all of it, as you will get outbid

> you could also see how an employer might try to keep a larger share But trying to keep a larger share means you lose out on all of it, as you will get outbid. If they can save other companies 1.2 million as well (which they will because few companies are so unique) then their price will naturally creep up towards that value as others will be willing to pay more because it's a good deal.