This angered the religious leaders of his day. They believed that the law was all that God had given in order to give life. They believed that obeying the law was life itself. They had become slaves to the law. Jesus came eating and drinking with sinners and speaking in parables to say that life comes not from our own efforts at obeying the law.
Life is a gift.
Life is a kingdom built not by our own hands but powerfully given by God alone. The revelation of this gift is given in Jesus himself. He is the Christ, the Messiah, not because of his perfect obedience to the law. His obedience was to God which brought him death at the hands of the law-keepers. The Gospel of Luke reminds us of the life that came to be revealed in the resurrection of Jesus.