More faithful, yet charged more? What gives?

https://www.washingtonpost.com/realestate/single-women-pay-mortgages-more-faithfully-than-men-yet-they-are-charged-more/2016/09/07/ce41bc02-744d-11e6-8149-b8d05321db62_story.html?postshare=2011473264075466&tid=ss_tw