A public health insurance option would ensure that everyone receives both preventative care and treatments required, reducing the amount of work missed as well as days of unproductive work due to illness. It would also cut business expenses in covering private insurance with taxes being funneled to cover the costs.
No, a public option would not benefit businesses, because there are already high-risk pools for people who cannot afford it. It would benefit businesses to not be obligated to provide costly health insurance to employees. This would benefits employees too, who could take their health insurance with them when they change jobs.