My interpretation of the buy-out package was that it was offered to 619 management level employees, and WDW would have been happy if all of them had accepted it.
That's not how voluntary buyouts work.
A company identifies a job category that is deemed to have too many people performing a similar function. Companies tend to use buy-outs only for higher level salaried employees. The buyout packages are offered uniformly to everyone who fits the criteria. Then nobody can charge age discrimination or any other kind of discrimination. It's much better for morale than lay-offs. And, frankly, it's a perk for having made it to a high-level position.
Human Resources consultants are typically brought in to structure the package so that it achieves the desired results, which could be 10% or 20% or some other percentage.
After the buy-out deadline, there's a reorganization. The goal is to perform the same work more efficiently, often with a "flatter" organization, or with high-level managers having multiple responsibilities, or with the removal of perceived redundancy.
That's what we're seeing now with Disney Parks & Resorts.
But I agree, the target was the removal of about 600 high paying salaries from the books. This is what the shareholders want to hear in order to keep the share price up there.
The target was clearly
not to lose every experienced executive at WDW! The shareholders don't want to see the company run without any experienced leaders!
Disney never said what the goal was, but 60 is more likely than 600.
Over time, especially in good times, management structures tend to grow top heavy (and too expensive). Executives build "empires" that increase their status, without actually accomplishing much for customers or shareholders. Periodic housecleaning can be a good thing -- as long it cuts the fat, not the meat of an organization.