Both the action and the substance, in fact:
The remote town of Musiri in the Tamil Nadu state has hit upon a unique idea to teach its residents proper hygiene: pay them money each time they use the toilet.
Users can make up to $0.14 a month to relieve themselves in a specially constructed toilet. Not a princely sum, but it’s extra cash flow that low-income residents can make just for answering nature’s call.
The government-backed program serves two purpose: It encourages people to discard age-old practices of urinating and defecating in the open, leading to diseases. And the waste product goes into research to test their effectiveness as fertilizers.
Here is the full story and thanks to Marco for the pointer. One point is that both the income and substitution effects predict the villagers will put on weight.