hello, thank you for engaging with this post. i intended it as a sort of "if you know, you know" wink to the preamble of the Industrial Workers of the World, the union to which i belong, but i am glad you chose to interact with it because it gives me an opportunity to better explain what this oft-misunderstood phrase means.
i hope you don't think i am @ing you. i like it when people engage with these concepts in good faith, which i believe you are doing, so i felt compelled to reply.
"the working class and the employing class have nothing in common" points to the inherent, built-in divide between the motivations and goals of the bosses versus the workers. this is true whether the workers are 1 assistant manager, or 10k warehouse staff. the employer's goal, at the end of the day, must be profit. if it is not, then that business will swiftly come to an end, as profits (and growth) are the only determining factors in the health and success of a business under capitalism.
workers, by the very nature of their relationship to the business, do not see cent one of profit. they get paid wages (or rarely, a salary), which are calculated as part of operating expenses/overhead. what is advantageous to the worker: high wages, good scheduling, benefits etc., is disadvantageous to the employer, as it all decreases their profits, and/or in the case of a publicly-traded offering, the dividends to their shareholders.
the motivations of the employing class and the working class are thus diametrically opposed.
let's talk about small business. USians especially love to champion the ideal of a small "mom and pop shop" that fights against the global megacorporation like David against Goliath, or Meg Ryan against Tom Hanks. it is largely a fantasy. the kindly intentions of a grandmother who owns a yarn shop and hires local at-risk teens doesn't dissolve the inherent conflict of employer and worker.
the total sum of humanity is varied and beautiful. of course i have known "small business owners" who are not monstrous fat-cat tyrants, crushing the working class beneath their patent leather heel. their intentions were pure. they paid higher-than-average wages, did their best to accommodate their staff's schedules, stood up for their workers against shitty customers, had BLM signs and trans flags in the windows etc. and they were nice people with good hearts who worked very hard and suffered immense stress operating their businesses.
surprisingly, the one thing they wouldn't do, that would have addressed the inequity between them and their workers, and potentially reduced their overall stress, was turn their small business into a cooperative owned and operated by the workers. why not? i'm a wobbly, of course i pestered them. why not take that next step, if you respect your workers and want to see them succeed as you proclaim? make them worker-owners who share democratically in the responsibilities and profits of the business, and give them a real stake in the continued success of the enterprise.
their reasons were varied: "running this business is hard! i don't want to burden them with taxes and insurance and purchasing and scheduling!", "i'm doing them a favor by doing all the hard stuff.", "they have it easy, they just clock in, get paid and clock out. i'm the one who sits up at nights running payroll and doing the books to make sure they still have jobs!", "because it's mine."
it would be unfair for me to not point out that many bar-backs, barristas, cashiers, line cooks etc. don't want to help with payroll, file for licenses, meet with inspectors, etc. many workers are content to go to a job that sucks less than other jobs they've had, work their shift, get paid and leave. but i would also argue that providing the option of ownership is better than not doing so.
all of this is sort of moot, however. if you read a bit further in the preamble, you get to the crux of the IWW's mission statement: to abolish the wage system and live in harmony with the Earth. small business reifies the wage system, which enslaves the majority of the human race in an unjust and violently enforced class division.
only through the realisation of industrial democracy, the abolition of the boss/worker relationship and the advancement of a cooperative commonwealth, run by the workers for the benefit of humanity and the Earth that feeds and holds us all, can we hope to survive as an emancipated species, free to achieve our fullest potential in our finite, fragile lives.
apologies for such a long reply. i probably rambled away from the point, but i have lots of adhd and i care deeply about industrial democracy. thank you again for engaging with the material. if you think the wobblies are wrong and that the boss/employer relationship is a justifiable and defensible hierarchy, i would be interested to hear your thoughts.
solidarity forever, an injury to one is an injury to all.