When talking to economists, one can often hear the differences in financial behaviours between people being explained by their material situation: people spend more money, buy more expensive products, and have bigger savings when they make more money. This seemingly simple relation is true when looking at it from a macro perspective and the observed statistical dependencies, but it is no longer true when approaching it from an individual perspective of a single person. It then often turns out that among any two people with similar earnings and a similar life situation, one person will have no qualms or issues with spending money, while the other will find it painful to spend even the smallest amount of money. Something that can explain these differences is that financial behaviours, apart from the level of finances held, depend on many social and psychological factors like, for instance, a person’s general approach to life, their level of optimism, sense of control over their life, relation to money, level of materialism, and money spending style.