"They have geostrategic political leverage hence nothing will get done"
Actually they have little political leverage with anyone but they do have a bloody big country which is all islands so to get around they HAVE to use aircraft . The bill for upgrading every airport instantly would be mind boggling - imagine the USA if the interstate road network disapeard - you'd HAVE to fly everywhere
And if you think going by air is risky in Indonesia just don't even Google PELNI - the state shipping line - if you want to sleep at nights.....