While there is considerable truth to what you say, it's not the whole truth. Food is a bad example, anyway: it's cheaper now than it has ever been.
"If everybody bought just the grain they needed to eat, and every grain producer simply put their product on the market for people to buy, without a "liquid global market" and price index, without traders in the middle wanting to profit from it, my food would be affordable."
Well, yes, but the grain would be in Saskatchewan rotting and you'd be wherever you are starving.
Worldwide trade existed and worked quite well long before our current financial system. I don't get why on would believe that without Wall Street the world would stop to function. Part of the fairy tale I guess.
"If everybody bought just the grain they needed to eat, and every grain producer simply put their product on the market for people to buy, without a "liquid global market" and price index, without traders in the middle wanting to profit from it, my food would be affordable."
Well, yes, but the grain would be in Saskatchewan rotting and you'd be wherever you are starving.