You could argue that taxes were designed before the "you are the product" age. If Apple sells a phone in Australia to a local customer, they pay Australian sales tax and possibly import dues to get the phone into the country. When Facebook sells data from an Australian user to a random advertiser, all tax is due in Ireland/Netherlands or some other tax haven and Australia makes nothing.
So while this approach with news media is a strange one, I think there is an argument to be made for taxing things differently. Make Facebook/Google pay a fair tax in all countries they're active in. Then each country can decide how they want to use that, if a democratically elected government in Australia wants to subsidize news using taxes they should be able to do so.