> That's a silly definition of "enough" to label as a fact.
There's no "factual" definition of "enough" as "enough" is subjective.
I'm also not sure what you're trying to argue. I already said that it can't be 100% for practical reasons and that the market actively incentivizes companies to aim for as close to 0% as possible instead. You pick 90% as an arbitrary percentage. So it might be 99% or 50% or 1%. But you're still agreeing that the measure for "enough" in this case is in relation to what the product of that labor can be sold for (after deducting the various costs). In reality that percentage is often much closer to 50% than to 90% - in many cases (especially so-called unskilled labor) it is closer to 1% than 90%.
A better rebuke would be that "enough" is normally about need, not revenue. Especially because it's nearly impossible to value the relative contribution to the bottom line for all labor involved (and in fact trying to minimize "cost centers" can lead to a rude awakening about this).
So if we define "need" as "enough to sustain a healthy existence in society and access to moderate leisure activities" (i.e. having a roof over your head, food in the fridge, access to medical care and transportation and enough spare change to spend on things like streaming services, books or the occasional trip to a nearby cinema, amusement park or restaurant) we can define a minimum monthly income and if we assume a 40 hour work week (which should be uncontroversial given that overall productivity has only gone up since its introduction and we need to provide some leisure time to accommodate family formation and the aforementioned leisure activities) we can translate that into a minimum hourly wage. Something tells me that this minimum hourly wage would be significantly higher than the legal minimum wage in the US, even if we don't actually consider the lackluster state of medical care affordability (note that I didn't assume public single-payer healthcare so Medicare/Medicaid is just a crutch to account for medical care being unaffordable otherwise at that level of income).
But of course the system is not set up that way. It's not about needs, it's about paying as little as you can get away with and this means that pay is proportional to power (i.e. C-level execs are paid a lot because they have a lot of control over the company and therefore "deserve" more even if all the value they "create" relies on the actual labor and competence of others) and the floor is theoretically infinitely low (i.e. you could realistically charge people to do labor for you, e.g. as a "training opportunity" to earn a meaningless qualification required to access other jobs) and ultimately the company needs to produce a lot of waste money (profits that are not re-invested in the company) that can be drained by its shareholders/owners (who ideally contribute literally no labor in return).