I can remember when we Aussies used to have the empty cardboard boxes dumped in a pile at the front of the store to pack our groceries in.

There was almost always a couple of floating 'packers' who excelled at fitting the stuff into an appropriate sized box or two. But when those plastic bags came in, the boxes were taken out the back where they are collapsed, and the floor space reused.

Of course, in those days, if you had a big run, then you used to just get the boxes delivered - used to be for free (you took the frozen stuff with you), but gradually delivery charges came in, till now the charge is too much for everybody, so you just dump the bags in the trolley, and wheel that home, leaving it on the street corner! BTW, those trolleys are VERY expensive!

I can't see why we can't just dump the groceries straight into the trolley which we are taking to our car anyway... and then we leave that lying around in the car park for others to run into...