Because the modern Democrats are primarily a corporate dominated party. They haven't really had any hard hitting legislation nor legal regulation/rulings on corporations in easily the last 30 years.
I doubt that is going to change anytime soon. They are a private entity, so they can manage and change their primary system any way they want.
I doubt that is going to change anytime soon. They are a private entity, so they can manage and change their primary system any way they want.