But even within the 1%, the income distribution is highly skewed, i.e. those 400 people are responsible for a very sizable total of the overall wealth within the 1%.
Income distribution and wealth distribution are not the same. It is perfectly possible to earn $500k/year (which would put you in the top 1% of income distribution that this article is talking about) and spend every penny of it, leaving you at the end of the year with the same amount of wealth that you had at the start of the year.
Similarly, it is possible to earn $200k/year (not in the top 1% for income) and save very aggressively.
"With a combined worth of $2.34 trillion, the Forbes 400 own more wealth than the bottom 61 percent of the country combined, a staggering 194 million people. The median American family has a net worth of $81,000. The Forbes 400 own more wealth than 36 million of these typical American families."
According to that article, the 1% are worth around $26 trillion. So to answer the Muffin's question, looks like the 400 have just over 10% of the 1%er wealth.
The quote says, "... the bottom 61 percent of the country combined, a staggering 194 million people." It's not comparing the number to the world's population.