Here is an analogy: the business has $150k to spend. Would you rather have it spent on a pair of paintings for the meeting room, or in company-wide renovations? I think it's rational to choose the latter, though it doesn't immediately affect your bottom line.
Ah, I think this explains the disagreement. That kind of "rational" has nothing to do with fairness, and everything to do with maximizing individual payoff. I think you've conflated the two, when they're almost completely incompatible. I knew you were a closet republican ;)
This is why I get supremely annoyed at claims that a specific non-mathematical argument is "irrational".
(Examples of non-computable things: company spends resources on R&D and makes more long-term profit; company spends resources on higher pay for everyone else and boosts morale; reputation of company increases and you attract a wider pool of potential employees; etc.)
In more mathematical terms, greedy optimisation algorithms in the name of short-term "rationality" most often lead you to a local, not global, maximum.
The word "irrational" doesn't mean "idiotic", by the way.