It's not compulsory to be noble or roayl to marry into the Royal Family - it's just more likely, you probably won't bump into an unmarried Duke or Prince doing your shopping at Tesco, as one tends to get one's shopping done for one.
Does one get one's shopping done for one? I think Charlie is pretty much self-sufficient these days with organic stuff all over his garden. And I bet HMQ uses tesco.com these days (she likes the three for two offers!)
Actually slimjim, one can only grow a certain amount of what one needs. One has to have toothpaste, toilet rolls, suits, petrol for one's cars, the list goes on. But thank you for thinking of one, one might consider one for some sort of honour next time round, if one can be bothered to remember.