I can hardly prove a hypothetical wrong, but what intrigues me about that last post is that you are, in effect, holding me to a higher standard than you do the Government. It's the Government's job to make decisions, ideally guided by scientific advice; but if the evidence on the effectiveness of wearing masks is inconclusive, or at least difficult to quantify -- which it is -- then the Government can hardly be expected to wait until it *is* definitive. That may take months or years, requiring potentially long-term studies of communities that wear/don't wear masks but are otherwise identical in their behaviours, etc etc. As a matter of good science, strictly speaking, there would never be a conclusion reached on a policy like this.
So the Government has to be decisive. It has to lead. That is its job. It is manifestly failing to do so, if it dithers over something like this.
As a separate point, suppose that the health benefits of masks were demonstrated. What are the economic consequences? We've heard here that some people would refuse to shop if they were obliged to wear masks, but perhaps other people would feel more comfortable shopping with them than without. Do these two effects balance out? If not, which is more dominant? I cannot take seriously the suggestion that the answers to these questions are definitively known. Again, the Government has to reach a decision over which side to back *before* the full picture is understood. That does indeed risk getting things wrong -- and, perhaps, risk them being blamed by me for rushing, although I can't see why they should care about my opinion anyway. But the Government can't hide behind scientific and economic uncertainty in order to protect itself from inaction and incompetence.