Of all the companies I'd like to get back at, the banks that brought down our economy back in 2008 top my list. Wells Fargo (NYSE: WFC), JPMorgan Chase (NYSE: JPM), Citigroup (NYSE: C), and Bank of America (NYSE: BAC) each received billions in bailout money following that debacle. I think it's time we consumers got a little payback.

The plan
Believe it or not, you can actually get a bank to give you money that you never have to pay back. You don't even need a phony gun, a threatening note, or a ski mask. Just use your credit cards the right way.

Credit cards can get you into a lot of trouble if used carelessly. But when employed correctly, credit cards are a great way to get banks to give you free cash and rewards. Take the following examples:

Company

Card Type

Rewards

Annual Fee

Pay by date

Wells Fargo Cash Back Card 1% cash back on net purchases N/A 25 days after each billing period
JPMorgan Chase Freedom 1% cash back on purchases + 5% for qualifying purchases N/A 21 days after each billing period
Citigroup Citi Dividend Card 1% cash back on purchases + 5% on qualifying purchases N/A 23 days after each billing period
Bank of America BankAmericard Cash Rewards 1% cash back on purchases + 5% for the first 6 months on qualifying purchases N/A 25 days after each billing period

Source: Company credit card offers.

Each of the above examples pays the user at least 1% on purchases. Though that may not appear like much, 1% can really add up.

Let's say that on average, you spend $600 a month on groceries. If you put that amount on your credit card, and pay it off before the end of the billing cycle (very important), you'll get $6 back each month. That's $72 in free money each year. If you're using the Freedom card from JPMorgan Chase, groceries count as "qualifying purchases" for certain months, so you'd get up to 5% back. That's as much as $30 a month in cash back, just for buying groceries. When you consider that you pretty much have to buy groceries each month, why not put them on the credit card and get free cash back?

Why this works
Banks make money on credit cards in two main ways: They charge the store when you use your credit card, and they charge you interest whenever you don't pay off your monthly balance. (That's right -- banks are actually hoping you won't pay them back on time.) However, if you pay off the entire balance before the end of the billing cycle, you won't get charged interest, and you'll still get the rewards. Great news for you, but bad news for the bank. Remember, though: You must pay off the entire balance, or you will be charged interest, so only use your card for things you've budgeted for.

Stickin' it to the bank
I don't know about you, but getting a bank to give me free money every month for things that I have to buy anyway really makes me happy. It makes me even happier when I consider I can take that free money and invest it myself for an even greater return.

For an added kick, you could reinvest the bank's money in bank stocks! Recently, JPMorgan Chase and Wells Fargo sported returns on equity of 11%, while Citigroup's return on equity was 6%. Bank of America's ... well, at a dismal -1%, I'll skip that one.

Want to keep up with any of the banks mentioned above? Click on the links below to add them to your Fool watchlist: