That really depends on the specific situation. I think a social impact bond pilot project in Canada that would be viable, sustainable, and well-constructed would have a reasonable rate of return that would reflect the underlying risk of the investment—or the loan, in fact.
I believe Canada has a very well-developed commercial banking market, and we should learn from that. A prudent social impact bond would see investors do their own due diligence on the potential service provider, which would develop a great deal of comfort that these objectives could be met and the thresholds of performance could be met. And by doing this due diligence, it would de-risk the potential investment and would, therefore, require a lower commensurate rate of return appropriate with the investment opportunity.