I think it's a good idea to encourage everyone to try to get paid more, since (a) corporations make massively disproproportionate wealth relative to employees and (b) programmers are bad at the type of social and interpersonal skills that are required for negotiation.
That said, as someone who has been through this, I think your advice is a naively optimistic oversimplification of the forces that hold programmers back from getting paid more and, for the most part, people who follow your advice will still end up getting paid less than business analysts and project managers for cultural reasons expressed by some of the answers on that page.
The only difference is, with your approach, they may feel as if they have done everything they could, rather than suffering in quiet resentment (and, from a psychological perspective, this is not to be underestimated).
That said, as someone who has been through this, I think your advice is a naively optimistic oversimplification of the forces that hold programmers back from getting paid more and, for the most part, people who follow your advice will still end up getting paid less than business analysts and project managers for cultural reasons expressed by some of the answers on that page.
The only difference is, with your approach, they may feel as if they have done everything they could, rather than suffering in quiet resentment (and, from a psychological perspective, this is not to be underestimated).