Rich people don't actually buy designer brands, the poor do. Luxury fashion brands have secretly targeted the middle class for over a decade, getting people to overspend on Gucci belts, Louis Vuitton bags and other flashy goods.
The CEO of LVMH, Bernard Arnault became the richest person alive with over $200 Billion Net Worth. LVMH is now the largest fashion company in the world, and they got there by ripping off regular folks like you and me.