Ask HN: Has anyone heard of taking out a loan to maximize ESPP contributions?

Was thinking about this the other day. If your typical Employee Stock Purchase Program (ESPP) nets you a 15% minimum essentially-guaranteed return but you can't afford to max out your paycheck contributions, why not find a loan for 10% or less to subsidize your paycheck so that you CAN max out contributions? From the bank's perspective, the only risk to mitigate would be the employee getting fired or the company going under. Seems like a win-win, but has anyone heard of such a practice?