The "proportionately" is assumed. It's possible to imagine circumstances in which the upper classes suffer proportionately more than the lower classes. We have

The "proportionately" is assumed. It's possible to imagine circumstances in which the upper classes suffer proportionately more than the lower classes. We have, in fact, had these circumstances. Such as the impact of transition from land wealth to industrial wealth during the first couple of industrial revolutions that saw various nobles having to sell their ancestral estates and belongings. Meanwhile the lower classes gained jobs that allowed them to afford more than they could before.