Of course. Take Sweden as a (admittedly extreme) example. There is very little regulation of the labor market, for example no minimum wage. All those things are

Of course. Take Sweden as a (admittedly extreme) example. There is very little regulation of the labor market, for example no minimum wage. All those things are agreed upon in negotiations between unions and employer organizations. But unions set the rules for the labor market as a whole, not just workplaces where the workforce had unionized. An Amazon warehouse with zero union employees would still have to have union conditions/pay for all employees. It wouldn’t be possible to not do it. And it’s not possible as an individual employee to negotiate a contract with worse terms (the equivalent of taking work under a minimum wage level). So in Sweden there is no recognizing unions. It’s like recognizing labor laws. Not optional.