You can start a worker-owned cooperative now. Why don't you? You could even make it a non-profit and save on some taxes.
What you want to do is make it impossible for corporations as we know them to exist, taking away freedoms. Corporations aren't slave-owners and employees aren't slaves. You have the freedom to work for one or start your own company.
I suppose a worker-owned cooperative would be fine, as long as the workers also took on losses (IE: if sales are down this month, you might only get a $500 paycheck as opposed to a $3000 one).
Then you would have to deal with the day-to-day stuff and you would end up having a president, treasurer, managers, etc, etc, etc, essentially creating what thousands of years of human history have already told you. Bitcoin, which was suppose to get around those pesky banks, essentially gave you the reason why banks are necessary: Most people don't want to or don't have the ability to secure their own money.
Most people aren't willing to take a risk. They won't start a company and take no paycheck for months or possible years while barely scraping by hoping their idea actually is successful.
Why should someone that takes absolutely no risk get anything close to the owners of a company?