Ecclesiastes 3:13 and also that every man should eat and drink and enjoy the good of all his labour—it is the gift of God.
This is not an encouragement for everyone to go out and have a rave! This is a confirmation that when we are able to work and earn our wages we should be able to use what we have earned to live a decent life.
God is not going to take that away from us but rather is going to continue to support us in our work so that this may come to pass.
We can enjoy our work knowing that we work for good because from our work we will be able to enjoy ourselves and even help others. We will be able to give back to God for what He has allowed into our lives. It is ours to enjoy because God has given it to us!