If your company did something that made everyone's job 10% more miserable -like maybe all salaried people need to work an extra hour every day to cover the lai

If your company did something that made everyone's job 10% more miserable -like maybe all salaried people need to work an extra hour every day to cover the laid off people's work- Productivity per employee would go up, and it would be impossible to really attribute any negative impact to the product to the layoff! But would that have been a wise decision for the company? If it was wise, the company should keep laying off more people, but how can you tell when it has gone too far?