I find myself less concerned with wealth than with greed. The notion of scarcity is also a type of projection that keeps us from putting a reasonable amount (or picture) on what constitutes "enough." The fear of scarcity keep people seeking wealth long after reaching a point where they have enough. In a sense, it is a variation on the mental illness of hoarding... except people are hoarding wealth, instead of old newspapers, or comic books, or whatever.
Money is not the source of evil; the LOVE of money is a potential source of evil-- if we even want to call it that. To use your example above, a million dollars is actually not a lot of money in today's world. But given various choices, I'd rather have a guaranteed 5000 USD a month in my bank account for life... knowing that I can pay my bills and live my life without worry. Because I know that's "enough." I have no need for a billion dollars... does ANYone, really?
There's a HUGE leap from "millionaire" to "billionaire." Philosophically speaking, it's also a leap from "needs" to purely "wants;" people need housing and food, people don't need 90-foot yachts or personal Lear jets.
As an alternative, let us suppose for a moment that we lived in a world where a person's success and status were measured by personal fortune amassed, but by the size and scale of a person's philanthropic contributions to individual and societal causes. It is-- quite literally-- a "philanthropy tax on extreme wealth. The "winner" is he/she who funded the most learning institutions, or hospitals, or affordable housing for the less fortunate, or contributions to a citizen's wage for those whose lower income jobs were displaced by technology.
Love the philanthropy KPI for measuring wealth. :) Also, this:
Scarcity is a fact of the universe. Production alleviates scarcity, while plunder magnifies it. My question is always whether someone gained wealth by producing for others, or through plunder. The modern corporate system is so intertwined with government that they are nearly inseparable, so I doubt any billionaires made their wealth honestly, but calling for more plunder does not fix the root problem.