@browncoat - Actually, you can do this technique with a lot of parrots where you basically raise the chicks alongside the parents. It works particularly well if the parents are fairly tame and used to you and you need a special nest so you can get access to the chicks without disturbing anything.
Basically you let the birds alone for the bulk of the work, but you regularly block the birds out of the nest for a few minutes and feed the chicks a few mouthfuls. Then, when they are older and leaving the nest, you continue feeding them longer than the parents do and handle them a lot.
This works almost as well as raising them without the parents in terms of taming the chick and it means you don't have to worry about feeding the babies five times a day. And I would argue that it's better for their long term health to be tamed and happy around humans, because otherwise they could suffer from stress.