This chapter investigates the role of socio-economic inequalities as an essential obstacle to sustainable consumption. It shows Poland's growing economic, social, and cultural disparities affect sustainable consumption. In explaining this relationship, we refer to theories relating to academics such as Veblen and Bourdieu. Inspired by them, we discover many more facets of inequality that cannot be captured only by the GINI-index. The same concerns the unsustainability of consumption, which contains both overconsumption and underconsumption, which is of great importance for post-transformation countries like Poland, which still catch up with the ‘old’ EU. We conclude by indicating some policies and strategies that could help overcome inequalities and contribute to greater sustainability while not adversely affecting sustainable consumption.