The USA is far wealthier, uses more carbon per-person, and is responsible for more historical emissions than China or India. We have an obligation to reduce our gluttony before asking others to go without.
I like to think of holidays and work / life balance as a measure of wealth. Rich people can take time away from work because they can afford it. If you need to work lots of hours and barely can have a few days off then you arent wealthy.
Let me ask again, if you need to work 2 - 3 jobs are you wealthy ?
If you can only take a weeks worth of holidays in a good year are you wealthy ?