That almost sounds like sarcasm to me. I currently live in South East Asia and you know who gets up early every morning grinding 12 hour shifts with little to no vacation? The million of poor people who don't earn much more than "survive" money.
Okay, probably it's about context so if you are in a first world country you just work hard and the wealth will come pouring in? Still sounds like sarcasm tbh.
Of the top of my head the five most well-off people I personally know didn't work harder than the average and I am sure wouldn't say so about themselves, either.