How can people buy more goods and products while they have lost their jobs?
The solution lies in increasing government spending on projects and companies that employ a lot of workers by keeping them in their jobs and trying to pay part of their salaries.
It also has to give direct subsidies to those who have lost their jobs and thus more money that can encourage demand if markets open and commercial activity returns to Normal positioning.
You have a good idea about the solution. Government is the biggest investor of any economy. So they can help the situation by investing in all sector of the economy hugely and the system will get back again, employment opportunity will open for all.