Fashion becomes a signifier of class structures. Such is the nature of social class that the elite never mix well with the commoners. We live under hegemonic structures, whether we like to admit as much or not, and we use fashion to not only preserve our differences but also to legitimize them. When the well heeled order haute couture, they order dresses that establish them as different. Wearing that expensive outfit becomes a statement that seals these differences once and for all. Thus, fashion is used as a fence to keep away lesser citizens by the elite.
Fashion has a cultural profile that saves it from trivial. Those who dislike differences of ideology and class are usually that ones that view fashion negatively, call it shallow and hold it for creating misguided desires. Those who come to accept that there is no easy utopia and that differences amongst people will remain, can seen fashion for what it truly is: an outlet for creativity, a tool of cultural production and the means by which cultural differences find peaceful voices.