I think you make a very principled distinction between 'de-jure' compulsion, and 'de-facto' compulsion, but in practice, things aren't always so clear cut. If

I think you make a very principled distinction between 'de-jure' compulsion, and 'de-facto' compulsion, but in practice, things aren't always so clear cut. If I were to offer a single mother a large lump sum for one of her kidneys so she could feed her children, without any kind of threat, implied or otherwise, that would still be at the very least ethically problematic, don't you think?