Not because they are staying which, if bypass is paid is completely legitimate, but because they have allowed the company to attack & undermine the conditions (yet again) of those on A-scale and undermined the aspirations of those on B-scale. Those aspirations, of course, are to get rid of B-scale.
The company sees it as its job to "press to test" on these things - it failed with B-scale training because people said NO.
These four said YES to the detriment of the rest of us.