http://www.abc.net.au/news/2015-12-16/credit-card-debt-austr…
Summary for the impatient:
You probably think you're better at paying off your credit card than you actually are
Banks get a greater return on credit cards than home loans
Banks don't cut interest rates on credit cards, even when the cash rate is low
Reward programs are only worth it for big spenders
Poorer people have nearly as much credit card debt as rich people
Cash payments are becoming a thing of the past
or 7. You don't need to have a credit card