It seems like an ethical move if you agree with Peter Thiel's model of stagnant US. Since we don't grow anymore, the only way for advancement is for others to step aside. We're not creating new spots from expansion like in the 50s. So taking up high earning spots to accumulate above self sustaining amount is taking jobs from others that haven't reached their FIRE number (which could be seen as unethical). This doesn't apply to new/growing fields like tech.