1. The businesses didn't know how to handle the workers not being in the office. While a problem in the past, this is now a solved problem thanks to COVID forcing them to figure it out.
2. The businesses tried to hire cheap workers. This is still going to fail, just as hiring minimum wage workers in the US for the job would fail. The workers you actually want charge the same no matter where their seat happens to be located. But I'm not sure that is applicable here as the parent is not talking about cost-cutting, but filling the roles that are no longer filled due to the strike.