Of course, every bee wants credit for their own find. So there needs to be a countervailing costly mechanism to prevent bees from simply over-promoting any pollen source they know.
Two problems with this. Most importantly, if bees have the same genetic interests (it's a bit complicated but see The Selfish Gene for Dawkin's explanation of why bees are genetically programmed not to have different interests than their hives) then there is no reason for a bee to want credit. Second, has any reward for the scouts ever been observed?