So suppose I'm a member of the upper class, and I always act in a selfish and rational way, seeking maximum benefit to myself at all times, without regard for b

So suppose I'm a member of the upper class, and I always act in a selfish and rational way, seeking maximum benefit to myself at all times, without regard for benefit to others unless it also helps me. Living thus in a society with a socio-economically paralyzed, beaten-down underclass will have negative outcomes for me. Parts of town fall into disrepair, limiting my movements and driving down my property value. More bums pester me on the street. Class-warfare politics threaten my interests. Etc. Crass but there you go. In the grand scheme, I'm incentivized to avoid this scenario, and if raising taxes on myself can do it, then maybe I'd consider it, arguably without acting at all in contradiction to my purely selfish, purely rational nature.