What do pigs eat?
Apparently,
James McCarthy (Microsoft software developer and manager) grew up on a pig farm in Iowa.
As my Iowan father used to say, "When there isn't enough feed in the feedlot, the pigs'll eat each other." McCarthy, J. (1995).
Dynamics of Software Development. Redmond, WA: Microsoft Press., p. 168.
Can you think of any segment of the population that, when there isn't enough to do
X on others, will start doing
X on and between themselves? Fill in something for
X and see how well it fits.