It is not like you are getting paid more hourly for each extra your put in right ?

If what you suggest is done, then you are basically selling your youth for equivalent time with an older body.

It may even be worse, since a 50 year old you may be worth a lot more /hr than you are now. So it isn't even an equal trade.

I have struggled to understand workoholic mentality for a while. Sure you work more, but to what end. For what ?