New Proposed Rate Caps Would Create Adverse, Unintended Consequences May 22, 2019 In Washington it’s not uncommon to have policy proposals that lack common sense. The same can be said for well-intentioned policies that create adverse, unintended consequences. It’s less common that a single proposal achieves both. But that’s what has happened with a congressional proposal that would cap consumer loan interest rates at 15 percent and allow the U.S. Postal Service to enter the consumer-loan business.