In 3:16, Qohelet expressed himself in a very similar tone when discussing the administration of justice. Although he may be alluding to historical events—collaboration with the Ptolemies in the Hellenistic period—the expressions remain universal in nature.
Verse 8 is mysterious; it might praise rulers for farming the land. It also highlights injustices committed in the name of obedience to authority, resulting in the poor losing money from their land.
The Preacher isn’t surprised by the oppression of the poor or those of lower ranks because these are facts of life. His reflections are always based on experience. But one question remains: do acts of injustice and exploitation fall into the category of things that must be accepted without resistance?