To keep my reply brief, wealth can refer to many things including material goods but let's restrict ourselves to money, since both of the articles you've cited

To keep my reply brief, wealth can refer to many things including material goods but let's restrict ourselves to money, since both of the articles you've cited does the same. Money is not a resource. You cannot eat or build with it. Money is a tool used to determine the distribution of resources. If total wealth has increased but inequality has also increased, it means the majority of people are increasingly losing the ability to decide the distribution of resources. This is bad even if you ignore the fact that the majority of people are also responsible for the production of said resources. Side-note but the articles you cited are funded by various non-profits including Bill Gates' foundation, departments of the british government and so on. It's a discussion for another day and I'm obviously not accusing it of outright fraud or anything but in my experience such "non-profits" and think tanks are tend to be most guilty of unhelpful or outright obscurest analysis of wealth inequality, unequal development and so on (as you one would probably expect of any institution funded by capital benefiting from such dynamics)