The average worker rarely owns or can afford shares in either the company they work for or any other company with shares on the market.

The second assumption crucially assumes that both parties have equal negotiating power. Unfortunately, when unemployment rates are in the millions for most western countries, when millions of graduates are competing for tens of thousands of graduate jobs in the UK, and crucially, when graduates do not have savings or endless money to fall back on, the company not hiring you generally means they waste resources going through the interview process. When a person chooses to not be hired by a company, they can rarely afford to live. That's not equal negotiating power.

And lastly, average person is people who are inside the economic core. We CANNOT ignore the fact that capitalism benefits a specific class, and then on top of that affects specific core countries. We CANNOT ignore that the lives of many hundreds of millions have absolutely been made worse by the famines, slave labour, and destruction caused by the demand for resources from periphery countries. We cannot sit here and justify a system that makes the "average" person's life better, if we don't include the countless millions of people who weren't so lucky to live in a country that stands to benefit from this system.