Interest, the payment for money renting, is based on time as you know. This is because time is death. These things are equal to financial death in modern countries for the active and those with big dreams. So people in general live in fear once they rent money. Their interest is in preying upon your already accrued weaknesses karma, with a new plan that guarantees you EVEN MORE long term debt and loss of your money to them.
Small people do, using credit cards and the like, and companies do, to expand operations.
The latter I'm not worried about. The former is of concern. The small working person, unable to enjoy enough in life on their real budget, uses credit cards and the like to increase their current lifestyle artificially under the illusion that they won't mind or will be able to repay the money they don't own because they haven't been able to earn it yet, because somehow in the future they will have enough money to repay this debt. So we truly have an illusory type of mentality going on inside the borrower. The lender wants the easy paper business of lending money and making money on that.