Let me put this bluntly. The economy is not driven by those who have the least money. It is driven by those who have the money to provide work for the less well off.
1 in 5 people in the UK currently live in poverty, or put it the other way, 4 out of 5 people do not live in poverty. Even if that number doubles during the current crisis and I doubt it will go that high, the majority will still not be in poverty.
When the crisis ends many of those first back in work will be those in the poorest paid jobs in catering, leisure industries and retail.
Many of those working from home on full pay will have been saving money by having no transport costs, purchasing coffees, lunches etc. Just because a family has 2 wage owners and in these liberated days, this applies to almost any family it does not necessarily follow that the family is dependent on the second income to save it from starvation. There are plenty of very comfortably off 2 income families, both working currently from home.
Yes, there will be economic disruption after this crisis ends, but I do not see it being catastrophic or even long term. There will be winners and losers, there always is, and I do think there will be structural changes in the economy over the next 5 years as the full force of the accelerated development of digital economy during the crisis is developed further.
But overall I think it will have far less effect on the economy than the 2008 financial crisis.