Earlier quoted context omitted.
No, they hobbled the competitors that their staff could have formed if they had made more money to do so. That collusion between these big companies to deny their employees a wage driven by free markets allowed those companies to accrue wealth and prevent competition from forming. That's terrible for their employees, that's terrible for the consumer.
How did their collusion stop a new company from offering more money than the depressed wages that the collusion was causing? Alternatively, if hypothetically without the collusion do you think the upper wage pressure would I have materially affected those companies bottom lines to not create the products that made them profitable?
And you're right, there's a distinct possibility the savings that they made in breaking the law could have affected their bottom line at the time in a way that prevented them from making certain products, but it could have also fostered creativity and innovation in the companies that colluded, and increased competition between them and the new companies that would have formed in a way that would have benefited innovation.
What's important is that companies don't break the law and that people are paid as much as they're worth so that they can in turn stimulate the economy in ways that they see fit.