Wealthier people or those meant to represent middle classes will generally surround themselves with white items.
This goes back millenia to the times when only rich people could afford 'clean' white bread, something which was still happening only last century, and the lower classes had to suffice with the bog standard 'dirty' brown bread. Throughout history, the 'richer' people were more likely to wear white clothes as they could have them cleaned more frequently, had more of them to wear, and did not partake in tasks which were more likely to dirty them, the 'poorer' wearing predominantly darker clothing as these items do not show stains as much and retain heat. Related to Ascetic Aesthetic and The Aesthetics of Technology, also Gold and White Are Divine. People dressed accordingly will be the Man in White and Woman in White, or a Fat, Sweaty Southerner in a White Suit.