yes and no, i’d call the distinction collective ownership. you can sell your shares (by quitting), or you can stay and participate democratically. but you can’t do both, and that protects your say in the company, preventing investors from overruling worker-owners.
> i have no influence
neither do the current workers. the issue isn’t retail investors, but the ones with board seats. if boards only had one seat for an investor, that’d be one thing, but usually workers only get a single seat, if any.
> protect current workers’ democratic governance
you could do this with preferred shares, voting shares, etc. investor shares are non voting, voting shares can only be owned by workers, etc. you still have to counter their concentration though.