The above is wrong on so many levels.
Once the income to debt ratio gets above 35% one is considered a credit risk. At that point the credit score goes down. 30% of one's credit score is based on debt. If the credit score is dipping below 650 the likelihood of getting an increase in the credit limit or a new card or loan decreases. Low credit scores can also hinder someone from getting a job.
Low credit scores & high income to debt ratios can prevent someone from getting a mortgage
Low credit scores and high income to debt ratios can also make a bank reduce one's credit limit to minimize a bank's exposure.
Personal loans can be 15%+
In addition, credit card debt rates are 25%+ A $10,000 balance at 25% is an interest payment of $200+ per month. Getting more debt just creates more interest payments. At some point one's fixed payments exceeds one's income & the next step is default. See the above post about consumer debt defaults at 10+ year highs.
If banks default rates get to high, that means they have less money to loan as they are not getting the money they loaned back to do more loans. If there are to many defaults they become more careful in making loans. With less loans being made there is less money to stimulate the economy.
You would thein cpa kevin being the great economist would know this