A couple of decades ago, we lived by the saying; "hard work ensure success".
In recent times, that is however not the case, as the whole system is evolving.
One can consider working for more hours as hard work, consider that with the wages on display currently as in most cases wages don't match the level of work, and the drastic economic situations, expenses are sure outweighing incomes from wages.
Hard work can lead to productivity and productivity can lead to more income for owners, not workers, as workers may be compensated with just a little pay rise. This then leads to my point, wealth comes from ownership of assets; such as businesses, real estate and even stocks, and not necessarily by hard work, systems are changing, and ownership income is increasing.
Hard work gets you there for sure, but it's no longer enough, ownership is the wealth engine!
I doubt if hard work has ever guaranteed wealth else wheelbarrow pusheher on the street will have been the wealthiest people but rather it's one working smart. Check out the wealthiest people you know of today, they work smart and not only hard. They use their money to buy time to earn more money by employing people to the job for them, if hardwork is the way, most of them wouldn't want to employ workers they will like to do those job themselves and earn more money. Companies are beginning to use AI to do some job to get more jobs done faster conveniently and to get more output in the shortest period of time.