Understanding our goal in life

If Yissachar and Zevulun share their income and their reward, why not simply split each day between learning and working? Why does the Torah take care to tell us how wealthy Avraham and Yaakov were? And if the Rambam says every Jew can reach the level of Moshe, how does a full day of hishtadlus fit with trusting that everything is from Hashem? A teaching Rabbi Asaf Prisman heard from Rav Boyer puts the hours we spend at work in a different light.