No, I want to work 4 days/week with only a 12.5% reduction in salary to reflect the improved output per-hour my employer would anticipate due to improved condit

No, I want to work 4 days/week with only a 12.5% reduction in salary to reflect the improved output per-hour my employer would anticipate due to improved conditions, and I want to keep all benefits, or no deal. I don't want the 4-day workweek to gradually morph into "people as a service", as I have my suspicions it may be intended to lead to.