There is no reason to involve businesses in the equation. If your goal is to ensure people have cash in the event they are terminated from their job, then have the government give them cash in the event they are terminated from their job.
There is no reason to over complicate things and require businesses to directly pay, figure out how much cash to always have to be able to pay, hire auditors to make sure they have enough cash, then take them to court when they don’t have enough cash to pay, yadda yadda.
Business sells product or service. Employee sells labor to business. Government takes care of the safety nets.