The problem is not "the money". Problem is mankind itself. Take a group of 3 people and give person1 1 Million €. person1 will be happy.

Give 2 Million € to person2 and person1 will be unhappy, spending all his/her time on getting ahead of person1 (instead of spending the time on a canny sunbed somewhere on a sunny beach).

person3 will start a fight because he/she has nothing, what is not fair. person1/2 will not give anything of his/her money to person3 because it's their property. Instead of this, the will spend most of their money on weapons, to beat person3.

Äh, ok, better stop now.