I absolutely believe a lot of companies outsource simply because they don't want to build an internal organ to do it. Even in government, despite what Conservatives believe, most organization heads are pretty focused on core competency and press to use outsourced resources. This latter also promoted by heavy lobbying by the companies selling the services.

This is a situation of "never attribute to malice that which can be easily explained by stupidity." Sure, some are motivated by malice or subterfuge, but most are probably just buying services because they have other things they'd rather focus on.