As I said in the match thread (and probably a couple of dozen times already) it's the economics
Phil Jones is on £110k a week, so if he was to move to Burley (for the sake of argument) he'd have to give up £60-70k a week to move, and he does
Danny Rose is on £60k a week, so if he was to move to West Brom (as they were linked) he'd have to give up £20-30k a week to move, and they don't
Nathaniel Clyne is on £20k per week, so if he was to drop down into the Championship, he'd have to give up £10k a week to move, and he likely would
Even though in real terms he'd be giving up significantly less of his wages to move than Jones would, it's also worth his while to sit on that extra £20k for as long as possible - while in comparison, Jones has already feathered his nest with his wages so even though he's giving up significantly more a week, he's also made significantly more, while on the other hand Clyne has made significantly less but if he wants to keep playing he accepts he will have to take a pay cut
If a club like Southampton or Newcastle came in for Danny Rose, the odds are that he would accept the move even if he'd likely have to give up 1/3 of his wages to make it happen - but once you start looking further down the table, or abroad to the second tier of Europe such as Turkey or Greece, not only are you having to accept a wage cut but also that you're spent as a top tier player