Oh they can...just ask em
In the XL fleet, we have a 78 year old (legacy retiree) who, while blisteringly incompetent, insists he's "just as good as you are" and has no intention of going anywhere. There are many others just like that.
We do have several who don't plan on going anywhere, but there are also plenty who are waiting to see what the company offers for a VSP. There will be movement, probably within the next year. How much is up for debate. It won't be enough to upgrade any newhires for the foreseeable future.