I'm just guessing that when you were earning peanuts you were either single and self-supported or living with parents. If that peanuts (say anything under 10k) was going to support a family, and you still managed to put 10% aside and meet your needs, I'm truly impressed. If not, you have no idea what you're talking about and you've managed to convince yourself that your good fortune equals fiscal discipline, and anyone who doesn't have it is just weak willed. Although the chances are also that you developed good financial advice from an early age.
There's a certain threshold of living requirements below which it puts incredible pressure on someone's income, and mental state; and saving becomes literally impossible. I'm not sure precisely what that is, and it depends on everyone's case - expenses expand to meet income increases - but there is still a baseline of survival below which you won't go.
This thread is relevant to maintaining the same lifestyle going forward, not making more or less money.
So ultimately the input doesn't really matter as the output is defined by the input to maintain the same lifestyle.
I do agree that there is a certain threshold at which it becomes quite difficult, but then at the same time things like UIF and TAX are a constant equivalent for everyone and simply because it's forced people manage to make do with those amounts falling away from their salary.
So imposing those "forced" charges on yourself is really where savings come from regardless of how much you earn and that is the discipline that Cius is referring to.
Often the pickles people find themselves in are silly life choices or other compromises that they were willing to take. I'm not referring to unforeseen consequences like job loss here, just general decision making.
However your point regarding financial education is a very valid one and I wish they would spend less time on other **** in school and teach people real world life skills like matter.
It scares me how many young people get straight out of school and hit their first jobs with absolutely no idea what insurance is or how it works, medical aids, finance loans, credit cards and credit histories, retirement/pension funds and other investments etc.
The first thing they normally do is run out and buy themselves a fancy cellphone on a 24-month contract for a ridiculous monthly charge, instead of putting that same money away from the word go for early retirement.