Setting aside 20% of income is good enough and I've been doing it for a long time.

Personally I was never burdened in the first place, the pleasure of seeing my capital growing is what makes me addicted to investing and saving certain percentage of my salary.
I know it too well that buying things that I don't really need will only make my life harder so there's that.

If you've seen your capital growing, you'd feel the same way too.