Something that seems clear, both from personal experience and observation of others, is that the act or feeling of want has an addictive quality. It feeds on itself. The more attention that is given to the emotion of want (it really is an emotion at it's core), the more powerful the emotion becomes. It takes on a life of it's own and in the extreme it can take over the life of the individual. And giving in to want - by acquiring the object of one's desire - leads not to satisfaction but to more want. The object of desire is an interchangeable thing, quickly replaced by something else almost immediately after it is acquired.
Some might argue that this is a good thing, that this insatiable drive is the engine of economic stability, maybe even the glue that holds human civilization together. Maybe the obsession with acquisition is a hidden hand ensuring that we all behave like good little boys and girls. Even if there is some truth to that there's also a carrot and stick aspect to it that (I would argue) detracts from one's quality of life. Some very wise minds have said that the 'secret' is not to want. That state of being is probably difficult for most of us to imagine but it is worth thinking about. And how free or happy can any of us really be if we are in a perpetual state of want?