You’re making judgements based on cost per head as of now - and credited your source as the Sun! Tests are in development to reduce both the cost and time to result. I find it hard to believe that movement will not have happened on this before next summer, given the incentives to do so.. Not to mention that history tells us pandemics do have a shelf life, one way or another this will pass.
My concerns longer term are how the Government are likely to confront climate change and the fallout from brexit. Perhaps the apparent reluctance to offer assurance to airlines is borne out of these factors..