Perhaps it's unfair to discuss eugenics in the way it would be used in an ideal world. I agree with you that the scenario you sketch seems far from impossible.
But I would like to submit your example now for your own consideration.
Are computer today not so ubiquitous that it's reasonable for an employer to require you to be skilled in their operation? Don't certain jobs just _require_ you to possess a certain physical or mental trait?
I know I'm begging the question here, and that 'being good with computers' is very different from 'forced to modify body because out of financial necessity'.
But is is also very different from 'accepting that time moves on, and that nowadays (2100AD) it's very normal to get a job-related tune-up'?
As opposed to the 'culture fit' and personality tests (which may or may not have a causal relation to the benefit that you provide to the company) a specific and objectionably verifiable improvement to a part of your body or mental capacity is not something that companies should be barred from expecting from their employees I think.
Also, military will do it WAY before private corps if they are still using human soldiers at the time. If you can give people enhanced strength and eyesight, with less sleep required and resistance to all kinds of diseases, you'd be a fool not to.
Obviously someone anxious and timid would make a better underling WRT primate dominance rituals, correct? So lets lower the testosterone level to nil, mess with the brain biochemistry to make them extremely anxious all the time ...
This is before we get started on short vs long term. So we got 100 applicants for every warehouse job, well, we'll only hire applicants with the Arnie S. muscle mod. Oh you say in five years they'll all be crippled for life due to skeletal and ligament problems, well, hey, manual labor has always been a tough life and we still got 99 applicants left for every job, so tough luck ...
Then there's morally questionable stuff... you can guess the genetic mods that will be mandatory at strip clubs and breasturants, but for women in corporate sales positions, things will be morally ambiguous. Of course things happen already with plastic surgery, and its assumed genetic engineering would be cheaper and more convenient... anyway people (well, men, mostly) make some hiring decisions for somewhat questionable physical characteristic reasons, and the situation will only get worse.
Your employer will be able to afford it before you can. I don't mean your boss, I mean corporate policy. People already tolerate all kinds of ridiculousness for "culture fit" and drug testing and semi-stealthy political tests. You can follow corporate's genetic fine tuning policy, or not work here, its not like we're forcing you to do anything...