Catherine Rampell: Take this safety net quiz  Editor's note: We
are running columns by Catherine Rampell of the Washington Post
while Kathleen Parker recuperates from injuries suffered in a
fall.   "Some of my friends are destitute. Some of them are
beggars / But, for me, there's a subsidy if I spend my whole
life preggers."    That was one of the more memorable rhymes in
an off-Broadway show I saw a few months ago, titled "Greed: A
Musical for Our Times." The revue was primarily populated with
covetous, conscience-free bankers, doctors, clergymen and Ponzi
schemers. Perhaps for political balance, though, the writer
included a ballad about a perma-pregnant welfare queen. Just
"have another kid," our parasitic protagonist croons, since each
additional spawn earns her ever-larger, never-ending government
checks.  It was a darkly funny song, with just one problem: It
was based entirely on a U.S. welfare system that ceased to exist
almost two decades ago, when Washington passed welfare reform.
"Another Kid" is o