anarcho socialism question

[captZEEbo]

I was reading about Socialist anarchism and I see they think this:

[ QUOTE ]
Workers would be compensated for their work on the basis of the amount of time they contributed to production, rather than goods being distributed "according to need"

[/ QUOTE ]

Who decides what work is considered "work" or who picks the jobs. If someone is picking the jobs wouldn't there necessarily be a state?