They take non type rated people, bond them, type them and generally lose them once they stay long enough to get the bond back.
This has been largly true in the past, with exceptions.
Some of the finest training I received at SVA came from 'displaced' Lockheed and TWA guys on the L1011.
Absolutely first rate, bar none.
SVA is not for everyone, however...if you stay for awhile (and NOT make a nuisance of yourself)...the salary can be first rate, and you smile at your bank book, every month.
Not a bad gig for those that can accomodate...and accept the...unusual.