WaPo’s Rama Lakshmi reports from the front lines of Narendra Modi’s toilet revolution in India where millions of toilets are being built, but not that many of them are being used. “We assumed that if the toilets are built, people will automatically use it. But we have to diligently monitor the use over a period of time and reward them with cash incentives.” (That’s basically what it took to get my kids to adopt the same behavior.)