An alternative view to that presented by David is that the crowd wanted to make Jesus king not because they were thinking about their next meal, but because they had recognized that he could very well be the Messiah and the Messiah was, in the eyes of many, suppose to be an authoritative figurehead who would overthrow the reigning empire and reestablish the throne of David. The Messiah was supposed to be a military and political savior. That's not why Jesus came, and it wouldn't have been in anyone's best interest for a Jewish Revolution to start right then and there. That would happen soon enough and result in Jerusalem being burned to the ground. Jesus wasn't looking for a temporary, horizontal kingdom. He was looking to the future for an eternal, vertical kingdom.
Regardless of their exact motivation for wanting to make Jesus king, they desire was driven by horizontal wants and needs. All too often I think we look at our savior the same way. God, I need this. God, please do that. We often seek God out of selfish wants and desires. I think we would do well to remember the "Your will be done" portion of the Lord's prayer. God has plans that are so much bigger than whatever needs we think we have.
Mike @ DCC