The marginal utility of a dollar decreases as the absolute number of dollars increases. The only way 2.5 million can provide significantly more utility than 500k (i.e not going towards a mansion in Atherton) is if the person making that much is giving it forward to a large network of friends, family and charities.

This is completely out of touch with the reality of life. 500k is enough to live in luxury anywhere, 60k won't be enough to survive in most tech areas.