Their statisticians are well aware where the point of diminishing returns is and I'm sure they're getting close. A shame the company had to go in this direction where it seems money is everything (and yes of course it's a business but they weren't this bad for 47 or so years).
You give a lot of credit to underpaid workers. At the end of the day Disney doesn't have the best in the business when it comes to most stuff which is why they visibly struggle in many areas.