These companies do not loan you money because they like you. If you do not pay, they will try and make your life hell. Now, once in a every 20 years YOU ARE IN CONTROL of this debt. They do not want you to walk.
They did not have your character in mind when they loaned it, they didn’t measure your character and give you a discount.. they measured you unmercifully by your credit. Karma? It’s the banks time for karma, not paying back a loan which was made for profit has nor karmic consequences in my mind. That will help prevent them from preying on people. If you need money, borrow it from friends or family – then yes you should pay it back.