First, it assumes that you will be paid for said productivity. If you are doing piecework or sales or something where your income has direct proportion to your paycheck, this is true. For most people working hourly or salary, this is not true. As you mention, you're paid by how you sell yourself. This is only nominally related to how well you do the job above what is expected.
(If you get a 2% raise for being adequate, 4% for going above and beyond, and 15% for working on your interview skills and jumping ship, your productivity system is not what matters.)
You are paid by a combination of how you sell yourself * the kind of work you do. It's not black and white. Work on grabbing the lowest hanging fruit and bottlenecks as in if you do a lot of good work, but no one cares, then work on presenting or finding a place that cares. Remove the block where good work is not valued.
First, it assumes that you will be paid for said productivity. If you are doing piecework or sales or something where your income has direct proportion to your paycheck, this is true. For most people working hourly or salary, this is not true. As you mention, you're paid by how you sell yourself. This is only nominally related to how well you do the job above what is expected.
(If you get a 2% raise for being adequate, 4% for going above and beyond, and 15% for working on your interview skills and jumping ship, your productivity system is not what matters.)