Outline planning permission has been given for 620 new homes to the south of Shepton Mallet, Somerset. This land is on Duchy land and the development is an enterprise between the Duchy and the developers. This and other developments will net the Duke of Cornwall considerable profit.
In 1760, when the monarch was allowed to hold onto management of the two Duchies they were near worthless. This has changed massively, and now the Duchy of Cornwall bankrolls William to the tune of over £20m a year.
The situation with the Duchy has been ambiguous to say the least. On the one hand it's run as a private enterprise, and profits go directly to whoever is PoW at the time. It describes itself as a private estate, and our government goes along with this. Although in the past (most recently the 1930s), the government has taken profits for State use, as it does actually belong to the State, and all profits could go to the State if it pressed for this.
William seems to be going hard on the maximisation of profits for himself and his family, and he's doing it with assets that don't belong to him. He's running the Duchy and taking everything for himself. Imagine of that instead went back into the public coffers.
I think it's time William was paid a salary for his management of the Duchy, but all profits need to return to the State and he can apply for another allowance if he likes. Considering the Crown Estates profits have meant that the Royal Family receive far in excess of what they used to, that application should be refused.