There are a number of independent local currencies that basically head in that direction, ANM, individual human time, goods and services represented by an exchangeable certificate. I think when things get too global, what was a fair means of exchange becomes too nebulous and open to speculation, which ... basically negates any honest valuation of what a unit of the currency represents. It's a conundrum; local money will probably remain honest but it's impractical, global money becomes a casino currency favoring the lucky, the amoral and the rich.