The richest 10% are responsible for about half of global emissions. That also works for energy, income and most other things in that area. Globally we have a bit over 18% low carbon primary energy. Since emissions and energy are closely related, that pretty much means that you can lower global emissions by 2/3 or so by bringing down the global top 10% emitters to a bit over global average. To be in the top 10% of incomes your income needs to be above $35,000 per year. That is above the median income of Norway, Luxembourg or the US. So even in the richest countries most of the population does not have to cut back.