Per study, there is a specific age range where your physical self and career peak (including your salary).  And because of that, you can save some portions of it and invest to grow and/or use it for later.  We need to learn to save now so that we have to spend in the future.  In my culture, it is saddening to see children providing for their parents because their parents did not save during their peak career years.  Let us break that cycle.