Oh, I don't know about sliders on every planet being such a bad thing.
I'm playing in a gigantic galaxy and I now have 245 colonies. Some I've just colonised. I want to put starbases in the new sectors I own and up production on them, but I can't. I really need those new planets to have a higher production level than the old ones, especially for constructors.
Even on some newly-colonised, well-developed planets, it tells me there are no resources for constructors (for some reason, but maybe I'm missing something) so I have to send ships from my home sectors on the other side of the galaxy. I already have a large fleet of ships so I don't want to increase overall military construction.
How about a compromise? Have a global slider that affects all local sliders. If you increase the global slider, all local ones increase as well and vice versa. That way, you can just use the global slider if you want. That'd be handy, as my new planets tend to always be on the borders of war zones.
Yes, I'm a micromanagement bunny

At least, I am when the circumstances need me to be.
I certainly like the idea that production isn't wasted. Especially if you are paying wages to a potentially idle workforce, you want them to produce *something*, be it luxury cars or replica Altarian holo-movies to raise your income. In MOO2, you had the option to produce "trade goods" to raise income, or "housing" to increase population growth.
I mean, the argument about wages and whatnot is all very well and good, but does that mean that if you reduce your social slider to 0%, you've suddenly laid off the entire social production workforce in your ENTIRE empire?