This really goes to show you can read any meaning you like into art.

See it's actually a depiction of class inequality, where the kings are represented by the fat petulant child who is withholding sustenance, wealth, and the means of production (represented by the fish) from the angry proletariat, represented by the cat.

Id like to hear Cuyp's own interpretation, because I think most art criticism is simply people ascribing their own meaning, like I just did.