What kind of bread does the torta use? Fast food joints would rather not have add another item to their list of stocked ingredients. If they provide free chips, they'll have to increase prices to cover the cost. Just because you would be willing to tip doesn't mean everyone else would.

Also, the reason traditional mexican restaurants give out chips and salsa is to give you something to keep you busy while you're waiting for your meal to be cooked. Fast food restaurants don't make you wait long enough to make that necessary.

Yeah, good point. I was just venting. The torta uses bread like a sub sandwich or a jumbo hamburger bun.