For any job duty requiring reading I am too slow. But if my job duties would only be typing, then I'd be faster than most people. Therefore, I want my employer to give all my reading tasks to somebody else and give me their writing tasks instead. I want to convince employers that it is better for them to find the best and fastest employee for each task, i.e. to consider each task separately even when they are part of different job-descriptions (task-centered approach), instead of looking only for the job-candidate, who can perform all job duties when considered as a group faster than his competitors (job-centered approach).
This could save lots of money for the company because if a new person gets hired and he/she is better or faster at a certain task than all the others, then the boss moves this task to him/her. This means that nobody's job descriptions stay the same, but instead, get changed because the manager should start optimizing the overall employee performance by trying to find the best and fasted employee for each little task even if he needs to assign unrelated tasks from different job description to the same employee as a result of optimization. On the other hand, tasks from the same job may be completed by different employees to maximize their combined strengths while minimizing their combined weaknesses.