I’m not exactly sure we are disagreeing.
> we’ll give you $2000p.a. to compensate for the increased energy bill. Would you really just keep paying more for energy because you have that?
In the suggested policy I was replying to, the $2k would decrease if I (and many others) switched to renewable. That loss would muddy the gains, discouraging the switch. Besides, the methods you are describing tend to have high upfront costs.
Hence, the need for subsidizing instead, something very close, but without a negative-feedback-loop incentive.
To be fair, while that is a reasonable policy (and why so many countries enact it), I would favor requiring each company to be individually carbon-neutral, with an exponential penalty.
As a result, it is not a tax which could weaken the vulnerable, and yet it forces companies to choose between reducing their negative externalities, and bankruptcy.
But computing carbon-neutrality is hard.