Vladimir Arkhipov's "Home-Made" (Amazon link) presents objects made by ordinary Russians inspired by a lack of immediate access to manufactured goods during the collapse of the Soviet Union.
I spent my childhood years with the black cloud of the Cold War over my head and this picture is actually kind of shocking to me because I was lead to believe that the Soviet Union basically did not have anything to sell - thus why the need for shopping carts? At the time I thought the USSR only produced bad ass hockey players and missiles. Meanwhile the U.S. stocked shopping malls full of enough crap for citizens of both countries. Oh, and we did have one kick ass hockey team thrown into the mix =)
Setting aside my astute political analysis, I am not sure this was meant for a bike, but it sure looks like a reasonable hack for a bike trailer - although the arm would likely work better if connected to a lower point on the cart.