Not everyone can be an entrepreneur because everyone's mentality is different, and also not everyone has easy access to funding that is needed to become an entrepreneur, so there will always be people who can only be employees and that does not mean they are slaves.
The tought that employees are slaves will damage your work ethic, so you cannot become a productive employee, there are also employees who can become successful people, even though their wealth is not the same as an entrepreneur but their assets are enough to live and can also be inherited by their descendants.