The resources needed to satisfy all the want of human being are said not to be enough compared to all the want of humans we have many want we would like to satisfy at any given point in time which we may not be able to meet up with due to economic problems scales of preference simple is setting our needs inorder of priority.
What do you mean by the resources needed? The resources depends on what you mean but generally I think what this hypothesis is saying is that human beings naturally is made in a way that they will need so much to be comfortable and survive and because the buying power available (which is money) may not be always available to get all whatnot needed at a particular time and so they need to be scaled out in order of needs or preference. Therefore in this light I think as a human being even if you have all the wealth in the world to acquire the material needs you have, you can't purchase your emotions, mood and things that has to do with fulfilment, happiness or sadness , this is why another wise saying says a man can not finish all the things he set out to do in his life time until he diedbecause after achieving one another is in line to achieve etc I'm yet to see a rich person who has stopped making more money in his life time and this hypocrically explains the insatiable need of man.