Stack you obviously did well and moved into a position higher than the average counterpart.
Not at all and to be honest, its a little insulting.
Whether folks like it or not the 'valued' trades in civvy street are not what they once were and decent quality logistics specialists are highly sought after in the ever increasingly "time is money" world we live in. Whilst techies may scoff at the thought, compared to many in the civvy world, service/ex-service 'stackers' are highly-regarded and often paid significantly higher than those the RAF provided.
Out of the ex-TSW (wrongly considered by many in the trade as 'de-skilled' stackers) colleagues I still keep in contact with very few aren't earning very good money post-discharge. Infact, given I re-trained as a nurse, I'm now probably on some of the lowest wages out of us all.
This is itself quite ironic, given we're discussing RAF trades earning more than they could in civvy street, because arguably nursing is one of them. As a RAuxAF nurse I earn more than any other Auggie trade with comparable rank/time served. I guess the MoD recognises the importance of actual life savers over spanner turning theoretical ones.