There's a problem with that theory: they're simply not going to stop buying them and switch to lasers.
We've had this dynamic for at least 15 years now, and people still are buying cheap-o inkjets and getting ripped off on ink cartridges. If people haven't learned after a decade and a half, they're never going to learn. Just look at the other comments on this discussion (including the blog posting that started it all): even on "hacker news", which is full of technologists rather than regular people, tons of people here have fallen for the inkjet scam. If a bunch of nerds don't know any better, than you certainly can't expect the regular public to figure it out.
We've had this dynamic for at least 15 years now, and people still are buying cheap-o inkjets and getting ripped off on ink cartridges. If people haven't learned after a decade and a half, they're never going to learn. Just look at the other comments on this discussion (including the blog posting that started it all): even on "hacker news", which is full of technologists rather than regular people, tons of people here have fallen for the inkjet scam. If a bunch of nerds don't know any better, than you certainly can't expect the regular public to figure it out.