They do that for a reason: Businesses stay in business, employees remain in the company, which means customer relations, supplier contacts etc. are kept, company-internal knowledge doesn't get lost etc. - and those employees still have money to spend in the economy. Keep in mind most of these schemes were already in place before Covid, they are not temporary measures and financed as such (e.g. they mostly work insurance-like and were well-financed before the pandemic started), though the money paid out was increased in most cases. The macroeconomic disruption avoided by this is immense.
What this additionally allows for is a) better planning beyond 2020 for companies, and b) much higher willingness in the population to cooperate in the preventive measures like distancing, masks and so on, which helps to explain the stark difference in new cases between both regions.