Reading the info there on the Fisheries webpage, it makes it fairly clear that the government have facilitated the program, trained the companies who have taken over the aquaculturing and generally oversee the whole thing due to the precarious nature of the population of wild clams. They are trying to provide the Indigenous owners of the land with work etc.
In a nutshell, I would say that it's probably not even financially affordable for anyone without mortgaging their house. You would argue that the person doing the job either has a degree in Marine Biology or effectively such a level of knowledge of molluscs.