Picture the scene. It’s the January 2nd, 2021, and an economist – let’s call him R.L. to preserve his anonymity – steps up to the weighing scale. Lockdown brought an end to a relatively short-lived gym career but, as far as the waistline was concerned, things went from bad to worse over the holidays. Lots of chocolate, very few kettle bells. Unsurprisingly, the weighing scale was not impressed and gave him a reading of nearly 74 kilos, up more than two kilos from a month earlier and over five kilos above his weight in mid-March, as the country went into…