In modern earth, my view on Maslow's Pyramid is not so much on an individual's change of needs.
Many depict it to say a person progress his/her needs up the pyramid. Basic needs being bottom of the hierarchy, and as he/she progresses in his/her career or social status the different level or stages of needs are seeked and attained. Perhaps make sense during the industrial revolution where people are either theory X or theory Y (Douglas Mcgregor). However, it is not so straight forward in the 20th century.
I see rather it's just an illustration on the EMPHASIS OF IMPORTANCE rather of each different types to us. EVERYONE OF US HAS THE PYRAMID WITHIN US ALL THE TIME. Basic needs are always the most important because you need them to survive, like money, health, and family. So the emphasis of importance of each level of needs is Always in a pyramid (e.g no one has need for Esteem more than Basic).
However, there is no one size fit all, hence the difference between individuals are the Size of their Pyramids.