Not really. Do you imagine social and economic classes and their relationship/attitudes toward another wouldn't be affected by this? Even if all it does is incr

Not really. Do you imagine social and economic classes and their relationship/attitudes toward another wouldn't be affected by this? Even if all it does is increase envy of the people who can't afford the treatments for their children, making that existing envy so much more concrete could have some pretty wide-reaching social consequences. No matter how strict your principle of harm.