Well £45k IS a good salary when compared to the national average. It's what I get (or thereabouts) for being a Personnel Manager for a very large UK retailer.
IMHO it's nowhere near enough to pay for someone with the expertise to keep a £multi-million aircraft and hundreds of people safe from harm.
You may be interested (or not) to know that the store manager of a very large supermarket (think big white sheds with red and blue titles) can earn a six-figure salary as well a great pension and share options.
Not as exciting as flying a jet I'm sure