He's erratic and irresponsible.

A man may work himself to death and wait in the grave for his money.

Do you wonder poor Blakelock met his doom through the cupidity of laggard dealers?
Here am I on the verge of God knows what from overwork--" Whitaker spared him disillusion.

Painting with Kenny was an occupation, never work.

When it slipped tiresomely into the class of work and palled, he threw it aside for something more diverting.
"The cheese in all probability," suggested Whitaker mildly, "wouldn't be under the piano.