Monetary addiction
Modern society provides so much abundance that it is easy to get addicted to the accumulation of things.
Hoarding is a uniquely modern phenomenon where the compulsion to accumulate possessions reaches debilitating levels.
A happy life requires all of the stuff you need to be comfortable, and some stuff to have fun with. But beyond that any additional accumulation promises diminishing returns.
Creating personal strategies to counter the materialistic urge is a necessary prerequisite to finding happiness in a capitalist society. Especially when the entire economy acts as a propaganda machine to try and make you buy more.
See Economic Materialism and Consumerism
The Netflix documentary "Buy Now" does a great job of showing how Amazon employs complex algorithms to trick your brain into becoming addicted to impulse buying.