1. The underlying logic behind earning to give is sound. You flying over to Africa or whatever to do charitable activities (digging a well?) is obviously going to be less impactful than you working at some high paid white collar job and then donating the money to pay some local laborers to do the same job.
2. Contrary to what you think, there's nothing about effective altruism that requires/wants you to donate to effective altruism organizations. Yes, there are effective altruism funds that effectively collect money and donate them to the most impactful causes, but there are also sites like givewell that tells you which charities are doing the most impactful work. I don't see how the latter is ponzi-like in any way. Even the former isn't really ponzi-like unless there's high administrative overhead (ie. most of the money isn't getting disbursed to charities and is instead spent on admin expenses).
3. This whole comment feels like an attack on a strawman on effective altruism and/or earning to give. The EA people I know of definitely do not give me the impression that they're willing to commit crimes so they can divert more money to EA/charities. I'll admit that I'm not deep into EA, so it's possible that I didn't witness their secret meetings where they they do discuss this. What you're doing feels like attacking utilitarians (eg. Peter Singer or John Stuart Mill) by saying that the logical conclusion to their ideology "creates an excuse to act outrageously evil "for the good of the longterm""