If they are derisory then its in terms of what footballers earn and what they individually have been earning. It can't and shouldn't be compared to a 'normal' salary otherwise. Also we should defintely only pay what we can afford but it does not mean it can't also be derisory.
If Lasley and Hammell, for example? have been on 1200 a week and they get offered 600 to play and continue coaching then they may deem it derisory wether we can pay more or not. However, if a 'normal' person is on 200 a week and is offered 600 a week then it clearly isnt derisory.
If I am on 80k year for example and someone offers me a new job using rhe same skillset for 40k it's derisory. But to someone else it clearly wouldn't be.
Can't compare the two.