רעה חולה

Before Perek ה I wasn't certain that Shlomo was קהלת. How do we know that it wasn't someone else who was the son of David? We had no way of knowing. Now that we have read Perek ה I am pretty much positive that Shlomo is the one that wrote Kohelet. Perek ה mentions a character that Shlomo brushes over for a second. It talks about a man who was once wealthy, but then lost all of his wealth suddenly. This man has nothing to show for his work that he spent his time on and nothing to pass down to his son. 

I think Shlomo is talking about himself when he created this character. Shlomo himself was once very wealthy because G0d gave him more than what Shlomo requested. He gave him a lot of wealth, but Shlomo didn't use it to help him become a better leader. Instead he used it to buy many chariots and horses, many wives from other nations, and other material items. (FYI these were the specific things that G0d mentioned that Kings were not allowed to have.) Of course all this wealth and physical needs corrupted him. G0d took everything away from him because he became too haughty to be a leader for the Jewish people. 

G0d gave all his wealth to his servant to show him that He is in control, and that G0d gives you everything that you have and can take it away in a second. I kind of see this as G0d laughing in his face because he switched the positions so that his servant who was the lowest of the low is now the highest of the high.