Ezy are keen to get the 'stable approach' (as measured by Flight data analysis) because there will be a reduction in Insurance Premiums if they can prove compliance in 9x.x% of approaches. Quite difficult to do sometimes as the average Airbus autothrottle has real trouble keeping the speed within the mandated parameters. Nothing directly to do with flight safety. There are all sorts of ridiculous things that go on in Ezy, but it's when something costs money that the full weight of their effort comes to the fore.
Having said that, I don't condone silly or dangerous flying - if that's what the sacked pilot did.