Ford famously raised the wages he offered, resulting in much better employees; however the only way he could make it so that his employees could afford to buy his cars was to make the cars affordable for the average family, since if he raised the wages to a level that meant they could afford his cars, he would only sell to his own employees and then he would have made no profit.

I won't comment on your assertion, except to say that Marx predicted the same, and yet it hasen't happened yet.