This is an absurd conclusion. Time preference is a function of wealth, not the other way around.
If you are a billionaire and can't even spend all your money without being completely reckless then your wealth will grow by the sheer nature of the exponential function, i.e. you spend 3% of your wealth but it grows by 6% so your wealth will grow by 3% forever until the economic system collapses since you have completely absorbed it.
Your time preference is basically 0% as you are unable to spend the vast majority of your wealth.
The time preference of poor people is very high, because their fixed costs like shelter and food massively outweigh the capital gains they earn. Yet every single cent they spend is partially paying the capital gains of the rich.
This has nothing to do with not doing YOLO or being smart or being rewarded, the system is simply rigged.
If this was a free market the interest rate would fall below time preference. In fact, the interest rate would actually have to go negative, not because time preference can be negative, but instead because time preference is actually unable to capture the nature of interest to begin with. It's a complete myth that time preference and the interest rate are the same thing. It's fundamentally impossible as time preference can only exist relative to the highest risk free interest rate minus time preference.
What is the highest risk free interest rate? Fucking 0%. Why is a 0% interest floor terrible? Because the real world undergoes a permanent increase in entropy and requires a perpetual energy input to stand still. So, getting 0% interest actually requires someone, anyone, to pay a non zero interest rate which represents the amount of energy that was added to the system to keep it standing still. In other words, the interest floor is below 0% and we simply forced it to be 0% by decree, against the will of the vast majority of humans on the planet. This is not a free market, it's an oppressive and coercive market.
Obviously, it is impossible for us to simply declare entropy increase nonexistent. The dust we have swept under the rug is still there. It's accumulating. You can see a little mountain forming under the rug. Yes, I'm talking about inflation. Because we refuse to face reality, we either have to perpetually grow the economy to make the mountain of money seem appropriate or we implement negative interest rates through the backdoor, with inflation where people start noticing the dust mountain getting in their way.
No, a gold standard does not solve the fact that we are mortal. It's just another way of ignoring entropy by decree.