It's certainly true from those I know. And as for the "they worked hard all their lives" perhaps some did. The ones I know had one parent working in pretty much 9-5 jobs. Nothing like the flat out, all hours working lives me and my friends and our partners have.
Our family have NEVER had a holiday, a weeks camping is out of our reach. Our very necessary car is 15 years old. We don't have an iPad, or even a laptop. We both work, full time, dh does shifts. We see one another for 2 hours max a day. We are both degree educated (student loans still not repaid). We didn't have as many children as we'd have liked because we couldn't afford them.
My mother, a single parent, who never worked more than a couple of hours a week owns her house, now worth c.£300k outright and retired at 55.
Our mortgage on our too small, decrepit house in the wrong end of town won't be paid off until we're 65
I still get eye rolls should I dare mention my fatigue with the sheer drudgery of our lives