Many contracts are 'fixed price' where the agreement is to maintain X no. aircraft for X no. months for £ X.
In this case the cost of the extra brake pads is borne by the maintenance company rather than Ryanair
@ SoS...So, you think the contractor has a free supply of brake parts???
A contract will based on "costs" plus margin.....If the margin is compromised due to costs being higher than planned,- a new or re-negotiated contract will reflect this (I suspect there would be a covering clause for excessive costs, anyway)
To consider that a Mx company exists to make donations to RYR is naive in the extreme.
RYR pays it's own costs.
I'd suggest that maybe those few extra minutes saved by "burning the brakes" are well and truly offset by enabling the next departure-slot to be met....AOG costs a fortune, flying aircraft is making revenue!