It’s a clear reference to shareholder primacy and it’s not wielded democratically nor is it something most even have a chance to participate in even though most have stock market exposure through retail buys, 401Ks, IRAs etc.
Half of the us population being shareholders doesn’t translate to a seat the table economically, not to mention is a red herring to the topic
The real issue is that there is legal doctrine that makes it hard for businesses to not be dominated by their largest investors / shareholders in such a way that extracting short term profits every quarter has taken precedence over building healthy sustainable businesses. Everyone is chasing the absolute most % of profit to the detriment to even the business
By definition, if a large enough group wields the majority of political power then they will always have “primacy”.
It’s like complaining about rivers flowing downhill instead of uphill.