Jane doesn't have to come up with a solution for the argument against chip and pin to be successful. It only has to be the case that it's less secure for the customer.
People can already withdraw money on their credit cards, but are unlikely to because they can also do this at a lower cost on their debit cards. Having to memorize a pin for your credit card increases the chance of someone using their credit card instead of their debit card at a cashpoint and incurring the extra charges.
Are you incapable of having a rational argument with someone without being patronising?
I'm not a fund manager or a shareholder in a pension company, but I'm sure you're right and ultimately I'll make a lot of money from chip and pin. When do you expect interest rates to rise in savings accounts and lower in mortgages and overdrafts? Or will I receive a lump-sum from my bank? This year? Next? I'd be interested to know.
How do you work that out?