Those Already Wealthy?

An earlier post ends on the point that the current conservative movement is all about helping out the already wealthy. This is done, it is often argued, because the wealthy are responsible for industry and such economic development that they should be aided in this great task. However, the policies proposed seem aimed at aiding those already wealthy. But are they the source of great economic growth? I think rather economic vitality is driven by those who whish to become wealthy, not by those who have already achieved that state.