poorly! for the UK
Depending how many years service (say 5) a jet FO should easily exceed that and a similar paypoint skipper should be on at least 85k. (inc variable pay)
There will be loads of examples higher and lower, but there will always be other factors which are affecting the pay.
In the UK £55k is ERJ145 skipper money, I think.
As an aside, I would imagine that £55k is what most accountants in the airlines think we are worth.