Matt Battaglioli writes:
If a potential borrower who is determined to be a rather high risk asks for a private loan, then their interest on that loan will be quite high, but at least in that situation, the borrower has the choice of taking the loan, or to not take the loan. In the end, the borrower will choose what he or she believes will most benefit him or her. Yes, the borrower might miscalculate and the loan might turn out to have been a bad idea, but at least the borrower had a choice.
On the other hand, if the amount of interest that could be charged on the loan were to be forced down via government regulation, then the firm or person making the loan would simply not offer the loan at all, as he or she would not feel their risk is justified by the legally-allowable interest rate.
Faced with a lack of loans, risky borrowers may then look to government and government-subsidized loans as an option, but we find here just another case of government offering itself as the (taxpayer-funded) solution to a problem it caused in the first place.