I will not assume all poor people are like that because basically rich people who currently prioritize their career paths over lifestyle were also poor in their past. So you also have to see some poor people who are smart in using their money because not all poor people are only interested in showing off their lifestyle in this world. Because I have also found poor people who are smart and prioritize their money to build a career rather than using it to elevate their lifestyle in a moment.
So we can conclude that it always depends on themselves when they want to use money because on the one hand I have also found rich people who are not wise in using their money. So we can't judge things like that from just one side, but we also need to see from many sides so that we can find something more appropriate to make an assessment of the rich and also the poor even though most of the poor people do care more about lifestyle. Likewise with rich people who generally also care more about their careers because they are considered rich by many people without having to show something luxurious in their lives.