It is not a binary situation, as you seem to be suggestion. It is possible to have immense respect for the devs on staff, but feel that for a lower salary, you can get someone equally as good or better.
And, as cruel as it is to say, the pool of potential developers for D&D is much, much greater than the number of positions available. It truly is an employers market, not an employees market.
I appreciate the thrust of what you are saying, though I think the phrase "immense respect" tends to mean something else -- when we
really mean it, that is.
More to the point, your reasoning is quite logical and is, I'm quite sure, exactly the reasoning utilized by WotC/Hasbro in these matters.
The problem is, it's a short-term assessment only and views the creative talent as not having
earned any legitimacy or goodwill of their own by reason of their many years of accumulated experience and effort. Because that's what you are paying them for. That's the cost of retention.
Instead, it views the problem of staffing only in terms of the opportunity cost of hiring a replacement at some vague and uncertain date in the future, while ignoring the goodwill and name recognition that attaches to its "immensely respected" creative staff -- as it throws them to the wolves. Or at least - that's where they used to throw them.
Now, its wolves + a potential hire/freelancer for their direct competitor. This is a new development which is an EXTRMEMELY recent phenomenon in the RPG "industry" such as it is.
In fairness, until
Pathfinder came along, neither WotC or TSR had to deal with a direct competitor in the marketplace that had its hooks in to both their IP and core business as well as to a competing claim on the goodwill and affection of their fans. Because
that development is new.
And that's my point: you pay these people more money because there is legitimacy and goodwill attached to their names. If you don't pay for it -- somebody else gets it at a fire sale price.
Bean-counters count beans. They don't count soft-assets. They attribute values to those things at year end for tax purposes. But they don't count them - and they certainly don't plan to manage or grow those assets with the short term hiring policy that you describe.
The line on your balance sheet that says "goodwill" and the other line that says "depreciation" next to your capital assets where it lists "trade-marks"? Those are notional amounts on a balance sheet which are
extremely hard to actually estimate real values for.
You can't count them in inventory; you can't
really locate them in a file. You can't directly spend them. It's difficult to pledge or hypothecate them. If you try and pay a dividend based upon their supposed value -- it's almost always a sign of inflated values ascribed to IP coupled with smoke and mirrors accounting.
But that doesn't mean that those values aren't real and that they don't matter. It just means they are very hard to count and harder still to manage.