We use debit cards though. I don't see credit cards often, but I do see everyone with debit cards. I pay almost everything with it since it's free, I can't screw up (debit cards have limits, or in any case the total amount of your bank account), easy, etc. I've been offered credit cards by my bank, but I do not trust them so I prefer to use a debit one. Also, Fnac or even supermarkets do offer cards, but I don't see the point of having them, and I'd say most people do not pay attention to this offers.
I live in Spain, and I've seen a similar situation in other countries except in Germany.
Germany also heavily uses debit cards, actually. Like 90%+ of the population have an EC card (a German debit card network), in comparison to below 8% for credit cards.
It is more subtle than you think. In the UK the Consumer Credit Act means that the protections offered to the buyer are vastly better when paying by credit card vs debit card. Particularly online, you would be foolish to pay by debit rather than credit. That also drives consumer behaviour.
I live in Spain, and I've seen a similar situation in other countries except in Germany.