LH, I fail to see that ostracism and scorn, and even death, as the lot of the "fallen" woman, was primarily money-based. The practice is deeply rooted in many societies, as Griska states.

In European societies, a pregnant unmarried woman, or even one suspected of having sex outside of wedlock, was not only ostracized but often deprived of any but the meagerest existence, and in eastern Europe occasionally was even stoned by her peers.

Condemnation leading to ostracism by church and society was common where I was raised, back before WW2 and the upheavals in society that followed.

I also remember that the man suffered along with the woman, through stringent application of the Mann Act (USA). I remember one couple who came to our door seeking aid to fight against incarceration for violation of the Act.

The social practices of Polynesian society have nothing to do with those of "Western" society. Not simple there either, crossing hierarchical boundaries in sex could lead to death.