This is like saying your restaurant chain is unsuccessful because it only has 1/5 the locations as McDonalds.
That's still a _lot_ of freakin' restaurants my guy. Costco is the only counterexample that I know of to "all workplaces need unions in order to guarantee workers' quality of life", but I think they might be the exception that proves the rule. That they've grown to be that big and treated their employees that well is a testament to how good economically, long term, it is to treat your employees as the valuable assets they are.
That's still a _lot_ of freakin' restaurants my guy. Costco is the only counterexample that I know of to "all workplaces need unions in order to guarantee workers' quality of life", but I think they might be the exception that proves the rule. That they've grown to be that big and treated their employees that well is a testament to how good economically, long term, it is to treat your employees as the valuable assets they are.