Just as a comment - I do have a close family member whom has worked at QF maintenece as an aircraft engineer and they have expressed to me that they have sometimes seen some below standard engineering work come in from overseas which has required re-work here in Australia. This person has recently left QF anyway so has no real agenda or barrow to push anymore.
Not saying its widespread.
I have no issues with your comment. I am sure it happens. However, how often do the LAMES within Australia screw up? Quite often I expect, but the union (and their fellow workmates) would normally try to cover up such incidents.