I've been thinking about this since the link was posted. Both my husband and I have a cc that is used for almost everything: groceries, clothes, etc. We never carry a balance. Bills are paid electronically through the checking account and we each get a monthly infusion of cash for personal expenses: lunches out, entertainment, lattes, etc.
And while I'm sure that using a cc does encourage us to spend more, I'm not sure how that's different from using a debit card, or even checks. Yes, the debit/check comes out of your account right away, but if you're flush, you're not going to give it much thought. If you have to watch every penny, you'll be doing it with a cc as well. Cash definitely has that when it's gone, it's gone effect, but but the logistics of the envelope system as applied to our life and spending patterns escapes me.
And the cc is just soooooo easy! Esp with a preschooler in tow. Although, as the CFO of a household with 3 cc, checking, savings, and various retirement accounts, I could use a little simplification on the record keeping end.
Definitely something to think about.