It is now possible to convert electricity to money using an Internet browser (like the one you’re likely using to read this post) in amounts lower than $0.001, which is the smallest unit of account for the US Dollar. Jobs earning that amount are constantly available by doing math on your computer that works on supporting open ledger systems called blockchains.
The product of the math work turns into cryptocurrency fractional coins which, when accumulated in large enough amounts can be sold for dollars, euros, yen, or any other conventional currency around.
The transaction costs are orders of magnitude lower than in the conventional banking system, enough that large classes of transactions that were impractical are now merely somewhat expensive. There’s a lot of room for efficiency improvements at present.
You can see an experiment running the first iteration I’m working with this concept at the project blog for Charleston Dry Feet. It’s currently generating litoshi from anyone who visits. Proceeds go to the worthy project of fixing Charleston, SC’s deficient storm water drainage system. You can turn the widget on or off with a button click.