Im about to start a job on 73k per year pro-rata (only working part-time) and I'll be rich compared to now. I've been living on much, much less than that.
Still, I put money aside into savings every week and don't touch it (even though I really need to touch it!! Lol). But I refuse to touch it. I budget very very well as I've had much practice. I even take food everywhere and very very rarely but food (take-away). It would certainly be harder with more kids. But then I don't have the capacity fir a second income as I'm single (and not looking).