You might want to work on a way to make a convincing argument to the general public. Because the echo chamber here notwithstanding, where I live nobody really believes there is a climate problem, or at best they give it lip service while they drive their new Escalade to Starbucks for a $5 cup of coffee.
I think that in reality we will not see people changing behaviors unless and until there are real observable climate changes that are affecting their lives. And even then I have my doubts.
I don't think complaining about people buying $5 cups of coffee at Starbucks is helpful for making a convincing argument. When you make statements like that, you give people the impression that your true motive is to attack capitalism and that raising environmental concerns are simply an underhanded tactic to do so. I understand your point about driving, but the brand of coffee and the cost is irrelevant and complaining about it is counterproductive.
There's no reason we can't address climate change and have $5 cups of coffee at Starbucks (although I prefer $2 cups of coffee at Dunkin Donuts).
Depending on how far it's taken, the carbon tax could replace every other regulation of carbon-based green house gas emissions.
However, our contemporary Republican part uses "anti-regulations" as code for "anti-government, anti-law enforcement", so I doubt carbon tax will get any play.
I think that in reality we will not see people changing behaviors unless and until there are real observable climate changes that are affecting their lives. And even then I have my doubts.