although they did practice agriculture and have a tribal system of goverment and except in Indonesia never founded any large cities I think they are closer to barbarians as far as game mechanics go then any other class.
Remember, Runequest does not have any class. The starting professions are just a mechanic to tailor your character to her indicated background.
If you are going to have Austronesians or quasi-austronesians, you'll probably want to define professions for them, with appropriate starting skills.
Also, I'd have no problem with a person who wanted to shift some points from his starting skills to other skills that are logical extensions of her background.
Certainly, Runequest is not D&D, where you have to try to shoehorn characters into preset boxes.
In my Runequest Modern game, I'm not even using professions for PCs. Modern professions might come in handy for generating NPCs, although even there I may just set their skills on the fly based on what is useful or associated with their profession. For PCs, the players are responsible for spending their skill points appropriately for the characters background and profession.
Of course the intent of this thread is to determine possessions. I think the intent is that the starting funds represents the approximate value of what your possessions are worth, and don't just mean that you are dropped into the middle of town carrying a pouch of gold and wearing a loincloth.
It's possible to determine basic starting equipment per profession, or just have one list that is used by everybody, or what I do is just have the players write down what their characters are carrying on a sheet of paper and hand it to me. I look over the list and decide if it is "basic equipment" that they can be assumed to have, or has stuff that has to be justified through expenditure of money.
Which is one reason to require a player playing a noble character to somehow pay a cost relative to the players playing barbarians and commoners.