Both reasoning from behavioral-economic first principles, and my personal experience, people are at their most evil out of fear, not greed. Growth means there is less fear going around.
I have a different take on “growth is good for harmony” (52-53). Arrow’s theorem doesn’t become more or less true if a conflict is between, say (+5, +1) vs (+1, +5) or (+2, -2) vs (-2, +2). Rather, the reason why the latter is more disharmonious is loss aversion.
Redistributing money to the rich (p88) is risky because the rich are not necessarily aligned with general population. Caring for old people (p91) is valuable not just for the sake of present individuals, but also as a commitment to future old people who are present-day workers.