NEW YORK ( TheStreet) -- At its most basic, the relationship between consumers and banks is one of trust. Customers hand their hard-earned money to banks with the expectation they will be careful and fair stewards. When banks overcharge for fees or offer savings rates that are feeble if not insulting, that trust is violated and may take years to repair (if it can be). These days, apparently, big banks are doing a lousy job of earning that trust. One industry group, the Washington, D.C.-based Merchants Payment Coalition, has been keeping a close eye on the consumer/big bank trust issue and is out with data saying U.S. consumers "do not trust big banks" and are especially frustrated with high fees charged by banks, which the coalition categorizes as "unfair." Of course, the coalition may well have an ax to grind. The group was a heavy lobbyist for the so-called Durbin Amendment included in the Dodd-Frank financial reform signed into law in 2010. That rule capped the amount of money large banks (those with assets of $10 billion or more) could charge on credit card swipe fees. The coalition has taken flack from consumer groups because the savings merchants have garnered from those capped fees haven't been passed along to consumers. Plus, banks now charge for formerly "free" checking accounts and are charging more for ATM fees. But there's really no arguing with the central point: consumers just aren't all that trustful of big banks. "What is surprising," explains Lyle Beckwith, a vice president for government relations at the National Association of Convenience Stores, a coalition member, "is the amount of money the big banks spend on public relations and advertising without improving their image."