What does Matthew 21:31 mean?

Which of the two did what his father wanted? They said, 'The first.' Jesus told them, 'I'm telling you the truth: tax collectors and prostitutes are getting into God's kingdom ahead of you.' Matthew 21:31 - Modern Text Bible

(Jesus makes it clear: people who seem far from God but actually change and do what's right are closer to God than those who just talk a good game.)