[mywittyname]

> Find someone that looks good on LinkedIn and offer them double their salary.

You make the assumption that individual employees are economically rational individuals. That is, they will optimize their lives to maximize income without regard to other factors.

It also asserts that employers clearly advertise pay for a position, which we know is not usually the case. It's not like you can peruse job boards and know exactly what every company will pay you. Sure, sometimes they have (very side) salary bands, but the vast majority of tech workers don't know what their offer will be until it is made.