Each company handles it differently. Some will be able to pass on all the added cost. Some will absorb a portion of the cost through lower profits. Some will change how they employ people.
Assuming all the added cost will be passed on is just overly simplistic and has no basis in reality. But I guess it's right at home in an economics model.
Actually economics says just what you just said. And then it adds thing like less profits means more marginal businesses close and fewer MW employing businesses open. And that higher prices for those products you raised the price of means less demand for them, and this means less profits still and fewer businesses that employ MW workers still. And all those things you euphemistically refer to as "how they employ people" cut in the direction of employing fewer MW people and perhaps thus reducing the quality of the service and experience for customers causing demand for these employers to fall further still.
So when you enter the economics zone it means MW workers get fewer jobs, fewer hours, and places that employ them will be more likely to shut down.
These are realities people in the ksen zone usually seem to deny.