Caesars friendly manner was what got him in good graces with the people of Rome more so than the money he spent. Caesars enemies didn't realize this, and he was able to gain power, not politically, or territorially, but through the people, so that eventually he could gain all the power he wanted to with ease. The gain of Caesars power gradually snuck up on his enemies, and, after he stopped spending money, they thought that all of his power among the people would diminish or stay the same, because the purchasing power of money was so great. Yet, since Caesar was so able to mix and be what the people wanted, which was friendly, the people loved him. Things can sneak up on people if they don't pay attention to them. The enemies of Caesar chose not to pay attention to his socializing with the commoners, and thus made a fatal flaw. By not paying attention to Caesars small actions, they were essentially giving up power.