I've said this before and I'll say it again. You put all women on the patch or something else that they can't forget to take at age 13. You raise the pension age to 70 and increase pension contributions significantly. You offer free healthcare for things which aren't people's fault (type 1 diabetes etc), and charge large amounts for healthcare where it is people's fault (type 2 diabetes, obesity etc). You cut benefits to people who have been out of work due to a medical condition that they have caused.
You make technology to have an expected life span of ten years (including phones, laptops and computers, if everyone has devices with the same capabilities developers won't write software needing more power so it will work, kind of, but the tradeoff is worth is).
You put massive funding into nuclear fusion, hydrogen fuel cells and space travel. You stop all overseas aid. It will work. Granted everyone will moan, strike and generally complain (you need to stop climate change and fix the economy but I don't want it affecting me). It will work. Resource usage will drop exponentially.
Let the down votes begin. "The truth hurts"!