Just so that I'm understanding correctly, you're saying a company that sells tens of billions of dollars of pasta per year is not interested in saving a penny ot a fraction of a penny per box?
Do you think anyone is going to win a class action lawsuit against a pasta company that 1-5% of the time puts just barely too little pasta in the box. You think we're going to have that kind of righteous justice? Haha. Do you think people would even be that surprised given that, as you say, "we're talking about one of the cheapest brands of commodity pasta here." No, if this was found to be true, whatever regulatory agency would just give them a warning.
It's not about being evil, is about the way capitalism works. If they're putting more product in the box than they have to, they're fools.
And you don't "precisely calibrate the machinery." You just figure out what the variations are and you set it to the minimum. If you're supposed to have something like 9-11 oz of pasta in your box and you know that your machine will give you whatever you set it to, +/- 0.2 oz of pasta, 99% of the time, you set your machine to 9.2 or 9.3 oz. You don't set it to 10 oz.