Furlough (if not abused by unscrupulous employers) is a Godsend.
Many firms would have had to make staff redundant were it not for this fantastic scheme (not a fan of the government, but this is a truly good scheme).
Whilst we are are slowly, very slowly, trying to get back to work safely, there are countless reasons why firms won't be up and running at 100%, and for some firms, they might not be up and running at all (consider a firm that might have a contract to paint and decorate care homes). They might not able to carry out their work for months yet... even though it's a viable company. Consider a firm that's switched operations from paint manufacturing to hand sanitiser, and doesn't need as many staff to produce it... should they carry on helping the NHS, but lay off staff, or switch back to making paint to keep their staff on?
We are going to owe a LOT of money at the end of all this, but the best possible way to recover will be with a strong economy, and businesses thriving, not waiting for new ones to have to start up all over again - which can happen, but takes a LOT longer and ends up being more costly in the long run.