I get that generally changing the terms of a loan after everything is signed is sketchy. But in this case it looks like they were trying to do the customers a service:
>The changes, which surprised the customers, typically lowered their monthly loan payments, which would seem to benefit borrowers, particularly those in bankruptcy. But deep in the details was this fact: Wells Fargo’s changes would extend the terms of borrowers’ loans by decades, meaning they would have monthly payments for far longer and would ultimately owe the bank much more.
I guess the devil is in the details, but if they just lowered the minimum payment what's the harm to the consumer? AFAIK the vast majority of loans in the US are simply calculated. If you make your payments as expected on time you wouldn't be effected. If you aren't able to do that, then of course you're not paying off the principle as quickly and the term would be extended. Just like making extra payments will shorten the term.
To be clear: changing the rate? Adding fees? Sure, that's really bad; rake them over the coals. But if it's just changing the minimum payment amount I'm missing the problem.