If you look at the reward/daily wage as a metaphor for Heaven, then it’s an undeserved reward as it is, for both the full-day and part-day workers - Incentive remains? Ie. If we got paid 25 btc for a day’s work, and the employer paid the same to some half-day contractors, we’d still be incentivized to do it again. And we’d probably be happy, for everyone involved, to be compensated so well.