I don't think it's simply a "can't afford" issue. If the parents don't make a conscious, long-term effort (like in the author's case), you risk a huge blowback

I don't think it's simply a "can't afford" issue. If the parents don't make a conscious, long-term effort (like in the author's case), you risk a huge blowback from them when the kids start acting "strangely". Nerds get bullied in school for being different than jocks; imagine having that happen with everyone you encounter, including your parents.