Not sure I agree with all your points, but I do believe you're on to something with this. I too am amazed at how people will not want to take any responsibility for their own actions, but demand/insist that it's the government's duty to "fix" whatever is perceived to be broken. (speaking generally, of course. Not pointing fingers at anyone here :wink
It's called the Tragedy of the Commons. Profit-maximizing individuals will overuse common resources unless there is governmental action to counterbalance that incentive.
Here in Boston back in the 1600s, landholders (like my forefather, Anthony) were entitled to graze a specific number of animals on the Common; this regulation ensured that there was enough pasturage for all the animals and that there was an equitable allocation of the shared resource. Absent such regulation, Anthony might have chosen to double his herd (yes, he lived on Milk Street) to make more profits; but if everyone had done this, the Common would have been overgrazed and able to support fewer total animals.
That colonial-era regulation was very primitive: it's a simple cap. If Anthony decided to get out of the dairy business, he couldn't transfer his unused grazing rights to a neighbor. Today, some fisheries use a "cap-and-trade" approach, that allows fishermen to sell their rights to another fisherman; we also use cap-and-trade in pollution rights, which ensures that the industries that can reduce emissions most cheaply do so first.
Once you have cap-and-trade, there is now a price associated with the activity, determined by the market but highly dependent on the cap level. Reduce the cap, and the price will rise. A parallel form of regulation is simply to set a price on the activity and see how the market responds. (Formally, this is the
dual of the cap-and-trade model.)
So, for example, the City of Boston might have charged for grazing at a shilling per month per animal; this might have had the same effect as a strict cap, but allowed a more efficient allocation of the rights and, arguably, a more equitable distribution of the resulting wealth. Why should only animal husbanders benefit from the resource of the Boston Common? If the grazing fees were allocated
pro rata to households, everyone would enjoy a portion of the wealth created by the common resource.
The analogy to carbon is direct: we have a classic "tragedy of the commons" because the planet has a limited ability to buffer carbon, but individuals rationally choose to use as much of that buffer as they find convenient, because it's costless (for them directly) to do so. We can't rely on the free market to solve the problem because, from the perspective of any individual person or corporation, there's no problem to be solved. When there is such a clear market failure, there is an appropriate role for the government to price the use of the Commons. We can do this through makeshift, patchwork regulations like CAFE, or we can do it cost-effectively through a carbon tax or a carbon cap-and-trade program.