some remarks
there are numerous pft schemes where you actually pay to build turbo or jet time. working for free is better than PAYING to work
flight instructors, even senior ones, get paid almost ...nothing
you cant support a family on a full-time CFI or FI salary (excepted multi and advanced instruction maybe), especially in northern europe because of the weather
when you work for MOL, you have to pay to send cv, for interview, for sim assessment, for type yourself ... you work for free on first year with all those expenses
in other professions, salary for apprentices is very low