They should have gone to this business model a long time ago. Of course it would have been a kindness to "grandfather in" those who have given decades of their lives and are now middle-aged with not much of a marketable skill set.
In practice, most Bethelites have just served 2 or 3 years and moved on. Their Bethel time was not, in itself, life-ruining. (The entire cult experience takes care of that.)
Bethel is moving towards having it be the norm that unless you're REALLY REALLY cut out for upper management, or you're already a University educated professional with a career to fall back on, you should not plan on serving more than 5 years. That way you've made your individual sacrifice to God, but it's not so devastating when you move on. Excellent use of "dedicated funds" and not quite so ruthless to the individual humans.
How they got to this model though was pretty sucky.
om