Security envelopes hold our lives in the balance.
When the post arrives, we are greeted with one envelope giving us money, or at least telling us that in theory we have money, but not for long - because the next envelope will take it away from us in the form of a bill or bank charge.
It's ebb and flow. It's yin and yang. It's Russian roulette with window pane envelopes.
More importantly, it's a total waste of paper.