Business is still running, just not all sectors. For those of you who know your HHG2TG it's the B arkers who are idle at the moment or to put it it today's parlance unessential businesses. That is not to say unvalued, far from it. We need consumers to start consuming much more than we need businesses to start businessing. The negative oil price is not due to hair dresser not using hair oil, it's because people aren't getting in their cars to drive to the hair dressers. Well on a very small scale but hopefully you get my point.
As we bring more normal activities back on line we increase the risk of raising the Basic Reproduction Number R(0) to above a manageable level for our health services. We can asses these risk but until they are active and we have results back from accurate testing we cannot map their impact. Currently key and essential workers are still working to deal with crisis and keep us in food, electricity and Netflix. These points of physical interaction are our current risk factors along with food shopping. Maintaining just these activities we seem to have brought R(0) below 1. So add more risk and that number goes up, go over 1 and you have to reintroduce the social isolation measures you have just lifted. All this while you are running your health service 'HOT'.
An example. DIY stores have just reopened in the UK and apart from selling paint and nails they sell plants and seeds. Garden centres are not open, but DIY shops are selling the same products. It is not that one has a higher risk than the other. Open both and you double the risk.
Open too much too soon and you have blown the work done with the first set of measures. If you are worried that it's going to be hard restarting the economy after one lock-down then you should really be worried that you have opened to soon, your economy can only take a beating once before it recovers.