That's irrelevant though.
Firstly, most people want electric windows for instance. Also consider the extra cost of putting keep fit windows in as an option.....you have to design them, get them manufactured, store them in the factory, put them in the manual, write the repair procedures up in the service manual, have how many different sets of door cards due to the different openings, have trim on the dash without the holes for leccy windows, have another body ecu.
The list goes on and on. It would probably cost Fiat a hundred thousand pounds to put a manual window option in for the 500, all so people could have something that most people don't want.
Rather regretting making a comment in jest as to how mean the standard spec of a VW is....
You can see it's cheaper to build cars to one spec, look at any Japanese car, lots of standard equipment but if it's not on the list you can't have it (in most cases). When building on an industrial scale it's cheaper to build lots of identically specced cars, especially if you aren't VW and can't charge 2 grand for a bonnet badge. Whether or not VWs reputation will survive the current storm and allow them to continue to charge more for the same as the class average is open to debate.