Simple? Real? Let me give you some numbers. Let's use electricity as a proxy for consumption[1].
Average global per capita electricity consumption is currently about 3000 kWh/a. To put that into context, you can drive your environmentally friendly EV (20kWh/100km) roughly 15 000 km (10 000 miles) and use no more electricity at anything during the year.
US electricity consumption is ~12 000 kWh per year. So if you want to not force third world to poverty forever and keep the global consumption at current levels (I'm not yet discussing decreasing global consumption, just keeping it at current levels). US folks would need to cut their consumption by 75% to allow the poorer to get even.
Sorry, but that is neither simple nor real. If we want to see the poor countries to rise to even mediocre living standards, we will face a huge increase in global consumption. You do not need to like this (I do not), but it is a fact. So please, stop whining about the need to reduce our consumption and start supporting initiatives how we can produce lots more energy and stuff sustainably. Because we need to do that.
[1] https://en.wikipedia.org/wiki/List_of_countries_by_electrici...