Certainly, SLJ are an influencing factor, particularly as these secondary duties become more than your primary duty. Being a little lax I allowied smarter more experienced people to advise me. It was quite interesting on how pay increases worked with promotion (maybe not nowadays). FLTLT pay, promoted = more tax and ohh, now the self-same house you are in is going to cost you more as you are now a SQNLDR and your wage has gone up. Same for WGCDR but as a CO of a Squadron with X number of aircraft, equipment, men under your control, staff car etc all great. Posted to a ground job, flying pay lost and now a paper pusher. For young chaps looking at this line of progression where you are often taking a step back it is little wonder that the commercial sector looked very good.