Read again: "The Quraishis are aiming at having God’s wealth entirely for themselves."
May be he wasnt getting the cut he was promised?
thats a disgusting accusation on umar .....
umar himself put the sabiqa system in place with preference for those who were earliest in accepting islam and then closest to prophet ...as umar was of banu adi he was lower down the order and got less stipend than many ....
if umar wanted he cud have gotten all he cud from bayt ul mal which was flooded with riches from conquests ...but all historians unanimously agree that he lived a simple life and didnt take a penny more than he was supposed to get ....
infact when people criticized uthman later it was to umar's conduct that they compared him to