For many CEOs, coronavirus crisis has been their finest hour; but how long can they keep this up?

Weary leaders must not revert to their natural instincts. We mustn’t, either.

It’s been some month for corporate CEOs, who have been transformed from poster children of American income inequality to American saviors-by-default — many of them forgoing pay, making no-layoff pledges, retooling their companies to help in the fight against the coronavirus, dutifully issuing mostly reliable information in homely video communications from their home offices.