Who has the "effecient sociopath"? Don't recall seeing that sort in the listings. Is that a nation specific guy or is it part of that "man of the people" (iirc) dude that cuts domestic spending by a decent percent?
Huh? The Efficient Sociopath is the guy who increases Foreign IC use by +10% but reduces manpower growth by -10%. Essentially, exactly what it says: efficient, but a genocidal sociopath. And possibly the worst Minister of Security choice in the game up there with Corrupt Kleptocrat. As for who has them, if I recall correctly there are some in Nazi Germany for rather obvious and best left unstated reasons.
Man of the People, on the other hand, is a great guy. Foreign manpower +10%
and manpower +10%. Absolutely necessary for a manpower-strapped country. His character description is also perfect for someone who wants to roleplay a relatively benign regime.
The guy who cuts consumer goods demand by -10% is the Crime Fighter. Who, well, fights crime well, so the populace likes the government and doesn't need as much pampering. This leaves more IC for other uses (but also mean you aren't making as much money). He also makes you reduce dissent faster at the same amount of IC because of that benefit.
All the exact information (though not discussions) can be found at the
HOI2wiki.