For the first time in human history, people can act together in this regard. The internet enables it. If you think about it, before the internet, no one wanted to risk court appearances and/or jail. Individuals stood alone, and could be singled out by the system. That has been inverted. Any one bank is smaller than the internet. Even if 15% more of mortgage payers don't pay on a certain date, that will clog up the collection system. And if you neighbor gets away without paying you won't pay either.