Setting aside the notion that peasant-like Walmart peons would have better ideas on how to invest 90 billion than a family that built an empire, you seem to have this bizarre obsession with what other people do with the money they've earned.
Newsflash, turd: if your bank account is above $0, if you own any assets right now, you are by your definition "hoarding your wealth".
You have no right to somebody else's money. In fact, you have no right to even talk about what they do with their money. To merely voice the idea reeks of communism, and how the collective can better determine the allocation of assets than the individual.
You've been brainwashed by the same people who think there is a finite supply of money in the world, as opposed to understanding that wealth is created when you provide ADDED VALUE. The Waltons did that(albeit with shoddy Chinese slave labor, but that is a discussion for another day) and thereby created wealth for themselves, in addition to thousands of jobs for American citizens.
Wealth is not finite. If you buy an apple from Guatamala for $1 and sell it in Cali for $3, you just created wealth.
Go crawl back down your envious, penniless hole that you came from. You didn't earn the Waltons fortune - they did. You will not make any decisions on what they do with it - they will.
Perhaps when Comrade Obama completes his coup and we line the Waltons up against the wall as we shout "Death to the bourgeoisie!", then you will see your dream fulfilled. Until then, perhaps you should mosey on over to North Korea or Cuba where no private businessmen are allowed to "hoard" their wealth and everyone lives in equal squalor and misery.
Oh this is good stuff. The assumptions made in this post are too funny. Is it a case of you don't know or that you don't know that you don't know. I think with you it's the latter.