As a roaring lion, and a ranging bear; so is a wicked ruler over the poor people.
A ranging bear - "ranging" to and fro with hunger.
So is a wicked ruler over the poor people - whom he knows he can oppress with impunity, as they cannot resist.
Related Commentaries of Proverbs 28:15
Proverbs 28:15
15 As a roaring lion, and a ranging bear; so is a wicked ruler over the poor people.