Its not arbitrary because the wage system enables the payer to keep the financials secret. If the inputs and outputs are divided then the whole balance sheet must be transparent. Withholding and omitting knowledge is shady as well.
Anyway, I'm tired. I'm turning my phone off. Here's a parting picture of me. https://image.nostr.build/5352f7d4ed0082dd4127d9217f719bd0b766c6f6e7b5e7bc59d8c3f6f9acfa19.jpg
... And its funny but my Murray and yours knew eachother. Below is an article talking about how yours kicked mine out of his living room in the 1970s. https://www.thenation.com/article/politics/bookchin-rothbard-anarcho-capitalism/
If we create an environment where anyone can start a business (or work to solve some problem in an economically sustainable fashion) without paying anyone else for permission, then we create a world were anyone who wants work has more options. Then arrangements where people are more open about all financial arrangements might out compete everything else. So long as the threat of taxation exists it might be necessary for most dealings to be private though.