"A man can do nothing better than to eat and drink and find satisfaction in his work. This too, I see, is from the hand of God, for without him, who can eat or find enjoyment? To the man who pleases him, God gives wisdom, knowledge, and happiness, but to the sinner he gives the task of gathering and storing up wealth to hand it over to the one who pleases God. This too is meaningless, a chasing after the wind." NIV translation
Do you find satisfaction in your daily job? If you do, then, this is from God. All good things are from God and He gives them to His children. A Christian is given the ability to work and even to enjoy their work while the lost are chained to a job. Many have great jobs making lots of money and yet still cannot find any happiness in their riches. The fact of the matter is that we, as Christians, will inherit all things and so the wealthy are only building up things that they will leave to us.