Hm, I understand your comment but I'm going to push back on it.
Two years ago I was a Research Technician working for a neuroscience lab in Boston. I was paid 32k a year (USD), paid 700/month in rent (with three roommates), 150/month heating during the winter (each roomate!), various utilities etc etc.
In Boston, the "Living Wage" is considered around $12/hour [1]. I made $15/hr, technically less because I worked longer than 40 hour weeks.
Despite that, I still managed to hit my employer's 401k yearly match ($1600), a good chunk of my personal IRA (around $3000) and saved $7000 to an emergency account. I had calculated that 7k gave me around 5-8 month runway should things go pear-shaped, or if I wanted to start something on my own. If you add that up, I saved or invested nearly 36% of my yearly salary.
To be fair, I was single and young. Kids, mortgages, etc add a lot to your burden. But still, you'd be surprised how much money you can save when you just sit down and eliminate silly things sucking down your money.
[1] http://livingwage.mit.edu/places/2502507000