[quote=@catchamber]
Why do they need leaders?
[/quote]

[quote=@catchamber]
Why is a government necessary?
[/quote]

Not saying either, or. But I will point out (since I'm still playing devil's advocate) that these are not synonymous words. People often do need and crave leadership and authority figures or something that guides their life. Finding it through religion, parental figures and in sadder cases celebrities. Some lead, some follow. As they say. Without a government, people would definitively still create groups and have people leading and making decisions in those groups. But that itself, isn't a government.