Lets imagine if we share the output of the world equally.
The gross world product (GWP) is the combined gross national product of all the countries in the world. Because imports and exports balance exactly when considering the whole world, this also equals the total global gross domestic product (GDP). In 2014, according to the CIA’s World Factbook, the GWP totalled approximately US$107.5 trillion in terms of purchasing power parity (PPP), and around US$78.28 trillion in nominal terms. The per capita PPP GWP in 2014 was approximately US$16,100 according to the World Factbook.
Each person would get $16,100 dollars a year. No side jobs, no second income. Each persons share is the same and is just the total of everyone’s efforts divided by the number of people. It does not matter what you do, fair is fair. Does not sound like there is enough to go around.
If you wonder why we have predatory completion. There is your answer.