Of course, socioeconomic class matters and matters.....A LOT! Socioeconomic class is the adult version of the high school pecking order. There are socioeconomic classes that are considered to be "A" group, others being the in between group, and some who are the "D" group- those at the bottom, the outcasts, and/or undesirables. In essence, there are socioeconomic classes that are considered to be desirable, hip, cool, and/or "in' than other socioeconomic classes.
In many societies, the socioeconomic dominant class(upper classes) is the class that has concentrated wealth and power. This is the socioeconomic class that calls the shots. This is the class of power and influence. This is the socioeconomic class that makes the rules that others follow. This is also the socioeconomic class that elects to follow its own code of law apart from the other socioeconomic classes. This is also the socioeconomic class that everyone aspires to be. This is the socioeconomic class of ownership, over their livelihoods, lives, and destinies. This socioeconomic class is also future thinking, thinking about planning and strategizing for decades and protecting their future generations.
Then there are the in-between socioeconomic classes. These in-between socioeconomic classes (middle classes) are the rule followers. They also have lesser power than the socioeconomic dominant class. Although they are less powerful, they also have a certain level of influence. In-between socioeconomic classes are often the following and strict adherents of societal norms. They are not as influential as the upper classes but are not as not bereft of power as the lower classes. Although some in the in-between socioeconomic classes have some power, they really do not have real power and the majority of in-between socioeconomic classes just told as they are told, no more no less.
Then there is the "D" group. Those are the lower and lowest socioeconomic classes. They are considered to be the outcasts of society. They are the ones who is looked down upon, even denigrated. They are held up as examples as to what not to be. They are utterly powerless and feel that they have no voice nor influence in their particular societies. They are in living hells of existence. This is the group that either people feel the most sympathy for or is the most despised. They, in general, are viewed as losers and lacking somewhat because of their dire socioeconomic straights.