Ehhh, the signal can be pretty valid even if it's not so in 100% of cases. And I imagine that it's less correct at the top: rank and file NGO employees are like

Ehhh, the signal can be pretty valid even if it's not so in 100% of cases. And I imagine that it's less correct at the top: rank and file NGO employees are likely to have made significant sacrifices in terms of pay or lifestyle to support their org's mission, but I don't know for certain that applies to the C-suite equivalent at the top.