In this case, just the king. So anybody who says the Bible supports the accumulation of wealth by pointing to David or Solomon's riches doesn't get it. They were in violation of the law.
But of course, I'm not an iron age Jew but a modern Christian who isn't under law. The gospel is what I follow and the gospel condemns wealth outright.
"Romney's 47% comment is a country-club fantasy"
- David Brooks
Conley (10-12-2012)
Focus: the King doesn't make money. The money essentially belongs to the nation. The King is entrusted with using it to help the people. That is what the quoted verse is about. If the King had a side business, I am sure God wouldn't begrudge him keeping that money for himself.
You err when you try to bring Marxism into biblical scholarship.