@Syntax Error
You should check your knowledge before you go accusing other people for mistakes!
1) the SFO's in Wizz have been given a RAISE in the sector pay, so indeed they make more money than just the Base Pay difference of 5.000€.
2) the pay back period for the TR is 3 years, not 15-18 months as you say.
3) taxation in many cases can be 0, especially for the starting FO salary.
4) in most bases you can live with less than 1.000€/month if you don't want a fancy life.