Implement living wage, cost of employing Doris to make the tea goes up.
You then either increase the cost of Doris`s product to cover the additional cost (Customer pays ...but feels better for Doris) or take the hit on the % profit and no business will do that.
Lets say Doris gains a £1.50 an hour increase in salary, then Doris`s boss wants the same % and and so on.
The cost of output has gone up, the salaries have gone up .............. its how inflation works.
If inflation is low, salary increases are sensible then costs remain stable. Doris lives within her means or improves her "lot" by bettering her career.
Remember there is always someone/thing at the bottom of a foodchain and that thing is normally numerous.
5 million kids living "in poverty" are only doing so because their parents shouldn`t have what they can`t afford.