I don't see why he should, after all he's better off financially driving for a smaller formula 1 team rather than in saloon or touring cars which is where most seem to end up.
His defence could be that he is doing better than Kimi this season
Quit? He should never have started! Always a nearly man, flattered by his machinery. A suitable stooge for Hakkinen maybe but little else. Every year we hear the hackneyed old refrain "maybe this'll be DC's year for the championship....".
Don't think so somehow...it wouldn't come his way in a millennium of Sundays.