It's exchange of money for time spent according to the boss' wishes. Employment contracts tend to be "$x units of money for $y hours per week, doing $job". Yo

It's exchange of money for time spent according to the boss' wishes. Employment contracts tend to be "$x units of money for $y hours per week, doing $job". Your "work for time" proposal ignores money, so that can't be right ;-) "money for work" is "that website for $3000". So to clarify, I'll propose "money for time spent on work". And in that case, punching out after working the agreed hours per week is okay. Idling in the office is not okay (exceptions apply if you just aren't given enough work units, which is the superior's duty).