Bags

How can a supermarket run out of plastic bags? I know we are supposed to be cutting down on their use but for the whole store to run out seems like extraordinarily poor stock management. I mean, couldn't they have cab'd some over from the next store over (it's only 10 mins away). They were handing out bin liners instead - flimsy things that wouldn't hold 2 tins of beans without splitting. They wouldn't give out bags for life for free either. Many disgruntled customers.