Australian ethical seems better on returns, and reasonably similar otherwise. There are also some ethical options on other super funds that are actually decent. Just have a look at what "ethical" means in that fund, what their returns are, and what their fees are
If they were buying it to build renewables, why were they okay to pay such a premium for it though? And why wouldn't they just set up a separate generation business that just built renewables? It's not like origin has a heap of experience in that space that they're leveraging.
When it can be connected to the grid there's lots of people happy to spend the money on renewables already, the big bottleneck is grid capacity and project approvals. We don't need this buyout to still get renewables investment.
Also the accc is too fucking toothless on competition. You just need to look at how much we pay for our own gas because of the gas cartel for an example.