The detail I paid attentopn to was "The judgment that it was unlawful for banks to pay a commission to a car dealer without the customer’s informed consent". In other words, some lenders were breaking the law. It's the whole commission thing and what you are paying and to whom, it has happened in other sectors before. Those guilty of breaking the law should be punished, including fines, to put off bad actors like Lloyds and Santander. Maybe the fines could help fill the black hole?
I've never paid interest on one of these car loans, but they seem like usury if you don't pay the balloon payment.
PCP is fine, effectively people are leasing the car. People have been happy with these deals for 25 years, by the many millions. Necessarily the payments would include profit, everyone would understand that. The numbers are openly set out at the beginning of the contract.
The case is not about PCP. Instead, regardless of the financing product:
In January 2021, the regulator the Financial Conduct Authority (FCA) banned 'discretionary commission arrangements' (DCAs). This stopped lenders allowing brokers (including car dealers) to increase interest rates on car finance, so that they'd be bunged more commission (even though they did no work). It's an unfair practice, as consumers weren't told, and many – thinking it a fixed price – didn't negotiate.