"When you're unemployed, finding work should become your full-time job."

This assumes there's enough of a job market "out there" that after more than 6 months you can still burn 40 hours per week on it.

"This is not possible if you're dicking around with ... volunteer work."

This doesn't even make sense. Most volunteer work doesn't require much money. You may be confusing setting up a charity or donating to a charity with volunteer work at a charity. Even something "time consuming" like serving soup at the church soup kitchen can't burn more than a couple hours.