“are walking about.” As in many cases, the average person is too busy with their own life to pay too much attention to what is going on with leadership other than to seemingly want something new and the promise of things perhaps getting better. Thus, the people would side with a new king coming along.
“the next youth, who replaced him.” Here the text introduces a third person, a second youth, who replaces the other youth who was born poor. Thus we see in this text a reflection of the theme in Ecclesiastes that there is a continual succession in life with one thing coming after another and the older things not really being remembered or regarded. Thus we see how ephemeral even royal power is.