Amphibiocracy by Timothy Bearly
Things went from bad to worse when a few shrewd frogs decided that they would simply claim all available pond space for themselves and charge a fee for the new immigrants to live there. Ipso facto government was founded, ergo a new system was designed, a caste system, a system in which the propertied class became the masters, and the propertyless became vassals. http://ping.fm/AMVpb