Anybody who buys wine can afford a £10 bottle - they just have to buy fewer bottles. The tax on pricier wines is lower than on the cheap stuff ...
See the table on this page to see exactly what you're paying for when you buy a cheap bottle of wine:
http://www.thirtyfift...ight-wine-pricing.asp
The taxes on a £5 bottle of wine are 56% of its price. On a £10 bottle of wine, they're 38% of its price...
If you spend a fiver on a bottle of wine, about 50p is on the wine itself - 10%. If you spend a tenner, it's about three quid - 30%. So you're getting a six times more expensive product for only twice the price...