Should we pay for a guy who's controlling another one just to prevent him from sleeping.
Sleep! He might consider that his airline has played a psychological game with at least one Captain such that he flew and nearly came to grief after suffering terrible grief himself, afraid that he would be severely disadvantaged or even loose his job if he were to dare declare himself temporarily unfit to fly. Wasn't the F/O pivotal in the recovery of the situation then?
If that had turned worst case, Ryanair would be a very very different airline now.