Im not sure this is a great example... yes the infrastructure of posting and applying to jobs has to go, but the cost of recruitment in this world would actually be much higher... you likely need more people and more resources to recruit a single employee.

In other words, there is a lot more spam in the world. Efficiencies in hiring that implicitly existed until today may no longer exist because anyone and their mother can generate a professional-looking cover letter or personal web page or w/e.