Didn't MrUpwardlyMobile specify that the minimum wage doubled? The owner could afford to hire a highschool kid for, say, $7 an hour. He probably can't justify the expense at $14 an hour, unless his business has boomed.
In Australia, the minimum wage varies by age. The argument is that kids are less productive than adults, need closer supervision and so on. We can argue about individuals and the exact fraction, but it's broadly true.
The adult rate is $18.93ph, but,
Under 16yo 36.8% of that or $6.97
16yo 47.3%
17yo 57.8%
18yo 68.3%
19yo 82.5%
20yo 97.7%
and 21yo and over have the full rate.
So there are still plenty of young people getting their first job. The bad side is that shifts at McDs mysteriously dry up as the kid hits 18 or so. But they're getting their start into the employed world.
MrUpwardlyMobile's business buddy probably just ran things badly. Even in countries with no minimum wage at all, businesses still die. Sometimes people just aren't very good at their jobs, including running the business they've run for years. As a small business owner, I am constantly astounded at how badly people do things and yet still manage to make money. Occasionally it catches up with them. Of course, it is never their fault.
It's amusing to me that the same people who preach about personal responsibility when it comes to employees, when it comes to business owners say, "oh but it's the laws... the regulations... the red tape... taxes... bad staff..." Why is my success or failure all down to me unless I'm running a business, then while my success still shows my brilliance, if I fail then it's The System?
The truth is that systems - whether official systems like government, or unofficial systems like Old Boy's Networks - can help or hinder people, but people do have responsibility for themselves, too. And if I have much, then I have a responsibility to give back. All the great religious and humanist traditions speak much about charity. In my faith of Judaism, the greatest charity is to give a person a job. One who takes over a company with many employees has a profound responsibility. "Cut 100 staff" may mean destroying 100 households, probably a few divorces, even a suicide or two - even if it means a $1 million bonus for the CEO. Typically, CEOs come from backgrounds where they did
not have to drag themselves up by their bootstraps, so they don't appreciate the power of their position to make or destroy lives.
There's an old racist joke that's also an anti-racist joke, if you think about it. "How do you stop a [racial expletive] from drowning? Take your foot off his neck." There are certainly factors holding people down, and some people are helped up, and others are not.