What an utter load of drivel.
Maybe I should be more clear on the types of maintenance here, Jet2 carry out in house maintenance up to C-Checks, with heavy D-Checks been contracted out to JAT Tehnika in Belgrade. I should have included C-Checks as heavy maintenance, as well, it is heavy maintenance. May I also point out that is exactly the same level of in house maintenance Monarch carry out on their own fleet, so 'outfits' like Jet2 are very much like 'outfits' such as shall we say, Monarch.
Jet2 send their 737 fleet to JAT Tehnika in Belgrade because they are a Boeing 737 classic specialist, you mentioned Thomas Cook and Monarch Engineering, you also said;
beancounters who make these decisions dont have to fly in the things.
Well yes they do fly in them quite a lot, and I will just add that the beancounters make decisions to send their aircraft to engineering facilities that can accomodate their aircraft, it really would be little use sending Jet2's Boeing 737-300's for D Checks at TCAE or Monarch!
You are saying that Jet2's fleet are maintained to a poorer standard than other airlines fleets as they are 'farmed out to whoever is cheapest', I will just draw your attention to how serious this allegation may be and something called a JAR 145 certificate from the EASA. Perhaps you should stop drivelling on about something you have no idea about, stop talking a load of utter crap about Jet2 and grow up.