One assumes he is a very wealthy man.
And the biggest difference between being poor and being wealthy is that the wealthy have choices.
I am sure I am in the majority on here whom have worked in jobs they hated, were stressed out at their work but had no choice but to stay on until sommat better came along on account of mouths needed feeding, little bodies needed clothed and educated, families needing a roof over their head.
If this job is too stressful for Koeman he really should walk.
I know his wife is in remission after surviving major surgery so that fact alone would point out to Ronald that there are things in life more important than both work and money.
So if he is staying on here to the apparent detriment of his health, and certainly to his appearance, merely for the pay out then he gets little sympathy from me.
He does not have to endure it.