Interesting. I've read that under the rules of Islamic finance, which forbid lending at interest, people have exploited similar loopholes. In the UK, HSBC (I think) offers an "Islamic mortgage" product, in which the bank purchases the house, the prospective homeowner rents it, and the bank agrees to give him the house if he's a good renter for thirty years. The loan market interprets lenience as damage and routes around it.