How does it affect others is someone wants 30 pairs of shoes? Who is to say that two or three pairs are okay but four are too many? If lots of shoes make a person happy, who are we to interfere? My uncle had buildings full of antque guns. In his nineties, he is having a blast selling them. Anyone over consuming is creating jobs in design, production, distribution and sales.
Love the verses in Ecclesates in this article, about a happy man, a content man is allowed to partake in their toil.
The Apostle Paul said the same thing to Timothy. 2Ti 2:6 The husbandman that laboureth must be first partaker of the fruits.