My parents only gave cards for birthdays (only for close family), Christenings, First Holy Communions, Confirmations, graduations and weddings and the was mostly because we were attending some sort of party attached to those events. We never sent Christmas cards, new home cards, new job, cards, anniversary cards. I did get a lot of cards wishing me luck on my move to the UK. However, as Chary said, there must be people sending these cards because they make them.
I did notice that DH received quite a few new home cards when I was here two years back as a visitor. We also received a lot of wedding cards from people I never would have expected to send one. So, I think there is more “card culture” here. I don’t think I’ll ever get into the habit though simply because I hate having tons of cards cluttering my house and I hate recycling them, so I don’t want to inflict that on other people. DH doesn’t like sending cards for anything other than birthdays and weddings, so if that's good enough for him, it's good enough for me.