Why would twenty known billionaires in England work for less than two hundred thousand a year,is it charity

Why would twenty known billionaires in England work for less than two hundred thousand a year,is it charity?
they employ their servants for this much,so what gives? they happen to be civil servants/MPs
Politics - 2 Answers
Random Answers, Critics, Comments, Opinions :
1 :
Well if they are billionaires then they don't need to earn much.
2 :
Its a tax shelter