I am not completely qualified to answer your question as I am only just about to join a company having qualified in January.
However, to add to AHs' post I think it is fair to say that there appears to be a lot of discontent within aviation due to the erosion of pay and conditions the majority of guys have encountered over previous years. The reasons and depth of feeling are well documented on pprune and a quick browse should give you a good flavour of "what and why".
I guess for the newer guys getting jobs, most are happy to get whatever flying job gives them a foot on the ladder, and do not have the same feeling of being dumped on by such erosions of status and remuneration.
Can't comment on the figure of 85%, but from my own experience in insurance and banking, plus comments from friends in other industries, I suspect most people dream of changing jobs to something where they percieve they would get paid a fair wage and are shown some respect - the grass always appears greener on the other side - but hey, that's life in a modern business environment!
I changed because I always wanted to do it, and got sick of 9-5 style slavery, office bull and backstabbing. Whether aviation proves any different remains to be seen but from the folks I've encountered so far it's looking good.
The view from the cockpit is the best in the world and the feeling that all the hard work is worth it when you get over each hurdle is a real high. Will that persist - ask again in 10 years!
Talk to as many people as you can, and make sure you know why YOU want to be a pilot and what YOU expect to get out of it. You could always try watching a few videos of real crews making real flights and ask yourself, could I do this every working day until I retire.
Good luck, whatever your decision
oap