Webcam Prices...WTF?

What is up with the price of web cams? Seriously, think about it. There is no reason for them to be so expensive. Compare a web cam to a digital camera. They are essentially the same type of technology but one is of much lesser quality. A web cam generally has between .3 to 1.5 mega pixels and a digital cameras currently range anywhere from 4 to 12mp’s. Web cams are quite simple in design and construction whereas Digital cameras have menus and buttons and screens and high quality lenses and batteries and memory cards and so on. So this being said, how can a Web Cam that has 1.3 mp’s and a USB interface cost about the same as a 5mp Digital camera with all it’s gadgets? IT JUST MAKES SO SENSE TO ME.