IMHO, if loans secured by equipment or inventory are made to prohibited basis individuals, or they are steered to those types of loans, it would be a problem.
All things considered, there is no issue if one product has a higher rate, especially if there is a higher risk. What the bank needs to do is analyze the product line and document that it costs more for; securing the collateral, inventorying the collateral, servicing the loan, riskier because of valuation, selling out of trust, etc, collections., etc. Documented higher risk - higher reward.
That being said, if the bank is going to do it to increase one product line, the bank might consider to do it for several, so the regulators cannot claim selective increases.
Integrity. With it, nothing else matters. Without it, nothing else matters.