No. We don't actually want the most economically efficient system here. There are other extremely important characteristics - fairness, due process, legibility,

No. We don't actually want the most economically efficient system here. There are other extremely important characteristics - fairness, due process, legibility, and incentives come to mind here. Like, presumably you could improve your creditworthiness prediction by cross-referencing against bankruptcy law related searches on Google and in library checkouts. We absolutely should not allow this, though - we care a lot more about having a society where people are free to read and speak about what they want than optimal consumer credit allocation.