Since the 1970s governments have been continually printing more money. This means that if you can get a low enough interest loan (i.e. by having a ton of money already so that you're low risk), the money you owe will devalue faster than interest accrues. You just keep doing that, and/or use it to invest.
Yes. But it's the same logic in different spheres. Just as you wouldn't concentrate resources in one industry, because it amplifies your exposure to market fluctuations and creates greater uncertainty. So too, you wouldn't concentrate resources in one person, because it amplifies fluctuations in their decision-making policy and... Creates greater uncertainty.
Since the 1970s governments have been continually printing more money. This means that if you can get a low enough interest loan (i.e. by having a ton of money already so that you're low risk), the money you owe will devalue faster than interest accrues. You just keep doing that, and/or use it to invest.