Crawling with Tourists

I had a meeting downtown today and was there early, so I did a bit of window shopping.

Who buys this stuff? Fancy-named clothing and bags and cosmetics and do-dads. Do the tourists? I mean, the place was crawling with tourists. I heard English, Dutch, French, Italian, and a number I couldn't identify on the short walk. I understand them buying the Berlin souvenirs and eating in the Bavarian (!) Restaurant Unter den Linden. But all these extremely expensive stuff - who has the money to buy stuff so they have the money to pay the rent?