Sadly, I'd agree with that - not just with VS but with all airlines. Older, more experienced crew cost more: sickness tends to increase, productivity to drop (once you've been messed around for a couple of years you tend not to be so supportive and less willing to tolerate more of the same). These aren't my views, but those of airline managers.
There is a never ending pool of naive and inexperienced young people willing to take on the role of CC (see the Emirates/Etihad threads if you don't believe me) for less money than we are being paid and/or for lower terms and conditions. Incredibly, some are so desperate and lacking in sense that they are willing to pay the airline for the priviledge of working for them.
As long as the travelling customer chooses price above all else then the airlines will continue to seek out the cheapest available staff - they have no option, in my view - and, no, I don't like it either!!!