So if it said a higher amount of a bigger sacrifice, you think you would get more support? What do you think would be a appropriate survey question to gauge willingness to make personal sacrifice to prevent climate change?

I think its a reasonable question and in line with what practical measures governments are making today to raise money to combat the issue. Maybe you don't believe in the political process to fix handle this issue, but there really isn't another option. And if you really think there's a good chance that the world will end in the next 100 years, why wouldn't you be willing to throw quite literally a few dollars at it?