As long as there is capital, there will be inequality. As long as there is inequality, there will be those who have power and use it in order to gain more power. And when that happens, no matter what you've done to make things better for everyone, it will get taken away.

That's why there is no socialism without a proletarian state that wields the force of that power to ensure the strength of the working class. Until global capital can be completely defeated, there is no socialism without communism.