However, I certainly can tell you that no FO in any airline earns €5000 net, more like €5000 gross. Maybe a FO at BA/AF/Lufthansa with 15 years seniority and training duties might earn €5000 net.
SFO's in at least two easyJet bases earn considerably more than €5000 net. Swiss based SFOs are taking home more than €7000 a month with the current exchange rates.