Don't let the banks treat you like a guinea pig

The banks know our money needs are generally quite simple, says Merryn Somerset Webb - but to grow their profits they invent new products and spend millions persuading us we need them. Take Egg's new credit card ads.

This feature is part of our FREE weekly personal finance email, Money Sense, written by MoneyWeek editor Merryn Somerset Webb. If you'd like to receive Money Sense to your inbox every Monday, click here: sign up for FREE Money Sense email.

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Merryn Somerset Webb
Former editor in chief, MoneyWeek