It depends on whether you are or he is looking at this from a purely financial perspective.
He certainly will not earn that kind of money for a very long time if ever but if its for a quality of life reasons then its hard to put a monetary value on it.
If you earn well but hate your job the hours the travelling and the people you work with then your health will inevitably suffer as will your productivity, which at some point your bosses will pick up on, you will probably get irratible at home with trivial things and take it out on your love ones who in turn could distance themselves from you.
These are all scenarios I have come across in my life with friends and colleagues in the end it all comes down to a life style choice.
From a personal point of view, I made a decision a long time a go to not take up a position which would have given me a very comfortable life style, but would have involved long periods away from home, long hours, working abroad .I was not prepared to for that and would have missed my children and my wife too much.
As it was I never missed a birthday, a school play ,parents days etc in all of my sons school years I watched every game he ever played in right up to 6th form, the massive joy this brought me when I saw him captain (twice) the county side to a national final and win is beyond measure.,,I also dropped my children off a school nearly every day of their school years.
It goes so fast both are at work now and have their own homes, my business allowed me to do all this and I would not have changed that for the world.
A lot of the people I know in the field I was offered above are divorced,estranged from their children, alcoholics or dead, thats a fact. Of course not all, but plenty tell me they missed out on so much and wished things had been better.
I guess it all comes down to what you want out of life.