I don't think it is all about greed.
It's not just greed (I mean at it's root GREED is there)
Imagine you had a job, you washed plates, and gave them to people about to eat at a buffet.
You got paid well, and enjoyed the job. You want to keep the job (or at least use it to get another similar one)
Your boss comes to you and says "Look, the metric we look at for who keeps this job isn't how well you wash, or how happy the customers are, but how many plates you hand out."
Once you cut your time doing other things, once you perfected handing out plates, you find you can hand out 100 per hour so 750 per day (you get half hour lunch)
Then your boss comes to you and says "If you can ONLY hand out 750 per day next week we have to let you go and try someone knew that thinks they might be able to get up to 800 per day"
You now have a few choices... you could skip lunch (not sure how long that works well) you could find a way to give out more plates, or you can look for another job...
where the overall organization greed is "we need to make more money this year then last, and more so next year" the individual even the C_Os and Presidents and VPs and Product leads... they want to keep there jobs, and to do so they have to hand out more plates (make more money)