“servant will rule over a shameful son.” Proverbs 17:2 is one of the many “ideal” promises in the Word of God. It was always God’s intention that people would get what they deserve in this life, and that is expressed in verses such as this one. This verse would be fulfilled here on earth today if we lived in a godly world with godly people, but because there are evil people and the Devil is the god of this age (2 Cor. 4:4; 1 John 5:19), people do not always get what they deserve.
[For more on promises like this, see commentary on Prov. 19:5.]