Well, you forget majority of escorts are single mums and students, which means they cannot set 40 working hours a week for escorting.
Another thing that escorts are also street workers and the rate then is not £130ph, plus not everyone lives in major cities where you can charge £130ph
then there is this quote: "Around 73 per cent were women, 19 per cent male, three per cent transgender and three per cent non-binary or intersex." male escorts can charge way less, that's where all the calculation happens