total possible effort from an employee is a shitty, exploitative way to measure job performance. is someone who sucks at 100% effort a better employee than someone who does an amazing job at 50% effort? better to measure it based on whether the job’s requirements are being met. if they are, you get paid. if they are not, you get fired. as you said yourself: if the targets are being hit the employer is getting what they pay for, and they’re entitled to no more than that.