Both major parties (Labor and Liberal) have huge donors from coal-mining concerns, as well as union support from coal-miners who - in a startling display of unification with the capital class - also oppose it because it's not coal-mining.
The world will be building fusion reactors in 2050, or spacebeamed solar power or opening a portal to the Warp or something for limitless free energy, and Australian politicians will still be talking about how "we can't just give up on coal".
Progress in this field is going to come from the private sector in-spite of the government who are already trying to kill solar power projects.