Because that is the reality for people on that kind of money - a complete barrier to work - why bother!
Basic
90,000
Pension (say 5%)
-3250
86,750
Tax @0% (Expenses)
0
0
Tax @ 20%
32800
6560
Tax @ 41%
53,950
22,120
Total Tax
28,680
Tax Credits
Single Person
1650
PAYE
1650
3300...