Yes and when you don't have something, especially when it is so driven into you from a young age by society as a main goal, then you think you will be happy when you get it.
A great example of this is I see so many new immigrants to America who for the first time their family has a real chance to get rich. America is the land of opportunity, you can set up a business, you can become a doctor, if you put in many years of hard work.
They work their whole lives to get rich because they think they will be happy being one of the rich folk. Like the rich that they envied where they came from, but weren't allowed to become under the rules of their society. I don't think rich people are any happier than average people, especially comparing to comfortable middle class people who have a bunch of savings.
On the other hand the journey and the pursuit for that wealth is the adventure, so they enjoy that journey.