Power itself eventually warp

Even if power is gained by kindness, generosity, and concern for the common good, power itself will eventually warp priorities and become less kind, less generous, and less concerned with the common good, which will erode her power.

For example, poor people give a greater percentage of their income to charity than rich people. Those in power often show more entitled behaviours, drivers of expensive cars are most inconsiderate to pedestrians, etc.