In my 36 years of involvement in this field, I cannot recall biomed techs ever being chucked on the heap. Guys have been fired (myself included) for all sorts of reasons, but not made redundant, in my experience.
In the private sector, when companies have merged, causing Service Departments to consolidate and stuff like that, guys have usually been found suitable work someplace.
In reality, it has always been (and continues to be) a "sellers' market". Just as long, that is (and as I keep saying) the "seller" - the biomed tech - is willing to move around a bit if need be, and also be actually willing to work!
As always, there continues to be a shortage of good technicians (and yes, I am still looking for them).