Explained in refreshingly direct Australian style.
tl;dw version: ford, toyota, and gm have all been building cars in australia for decades. as consumer tastes changed, rather than offer new, different models to cater to those changing consumer trends, the companies complained to the government and got yearly $100m prop-ups. then, rather than use the money to adapt and produce cars that consumers actually wanted, they just pocketed the cash, and when sales kept dropping because they were still producing cars that fewer and fewer people wanted, they just kept complaining and pocketing more taxpayer money untl this year when all 3 factories closed. australia now has no auto industry at all.