keeping up with the Joneses, your neighbors, etc. So if you die with the most toys, you won't be able to take them with you. Your toys and your wealth will go to your family, or the government, or whomever you left in your will.
Basically we spend most of our lives working for souless corporations that worship money and power, not God, and we do this to get more money, yet it hurts our health. Then when our health is gone, we use what money we earned to try and get the health back.
Of course that movie did not say what happens to the really really bad people, etc.