Earlier quoted context omitted.
So I'm guessing you have found your attempts to hire senior devs in Australia to be easy?
I'm not a hirer but a lowly employee. See my recent edit. I keep an eye on the market and I haven't seen any crazy wage increases. I'm not against being convinced of the point but atm I'm just not convinced that there's no senior devs to find, at the right price. Also, how long have these visas been going on for? It's kind of a chicken-and-egg problem I guess. Because of the band-aid fix of the visas, the wages never…
You are convinced there is no problem when you admittedly have no experience with the issue. You're also expecting to see changes that wouldn't fix the problem because of your lack of experience with The problem.