solarpunk memes

I am not sure how another economic system will fix this

You answer yourself shortly afterwards

The issue is getting this done politically

Under socialism, since there are no private owners of companies or oil, there is no incentive for them to lobby the policy in their favour. If you want evidence for this, I could pinpoint you to the People's Republic of China manufacturing some 95% of the world's supply of photovoltaic modules (already the cheapest form of energy available to humanity), spearheading electrification with Ultra-High-Voltage electric transmission lines and battery technology and supply, and leading the current generation of nuclear reactors. In contrast, my capitalist homeland of Spain had a "tax to the sun" during the previous decade that destroyed whatever solar industry we had, because in Spain the fossil fuel lobbyists do have the power to dictate policy, as opposed to China's socialist system.

I am not sure how another economic system will fix this.

Other economic systems have assholes, true, but capitalism is uniquely myopic in this respect. A socialist system would take away the polluters' power to hinder change. There's a reason (still capitalist to be fair) China is a world leader in renewable energy, and that's because they don't have rich and powerful lobbies forcing fossil fuels down people's throats.

But I would argue setting the incentives right, can mitigate damage

Until capitalists use their wealth and power to remove those incentives, which leads us back to "end capitalism." This is the fundamental problem with reformism; under capitalism there will naturally be mechanisms for resisting and winding back said reform, making "nicer" versions of it mere interludes interrupting the crushing boot of exploitation and destruction we all know and love.