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.
This is only half true, it is true that we cannot satisfy the wants of very single person around the world as our resources are limited, but I do not know if you have noticed but thanks to the advancement of our technology and our knowledge we have now many more resources than what we had a century ago, so if humans are able to master technologies like fusion power then satisfying our wants will become way more likely and the majority will enjoy improved life conditions as well.
Humans by nature are never satisfied with thier needs and they always find it insufficient so they keep on complaining about that.
Realistically advancement of science and technology have provided humans with millions of facilities which they are using.