Meh. When you're scrapping along on £20k, £50k sounds like a lot more.
It genuinely isn't that much more after tax, NI, student loan contributions, slightly smarter clothes and maybe a child or two more than you had when you were on £20k.
But you'd never have believed that when you were on £20k.
Hopefully the big difference @ £50k is that you're not actually robbing Peter to pay Paul any more, if you're sensible.
4 or 5 people living on £50k, who bought their house relatively recently probably can't afford a standard package holiday without being reckless, for example.