The Swiss grant bail to Roman Polanski on the assumption that as a responsible father he will, especially in view of his advanced age, attach greater importance to the financial security of his family than a younger person."
If it were me, my assumption would be that Mr. Polanski, as a confessed sexual predator will, especially in view of his advanced age, attach greater importance to satisfying his sexual urges rather than the degree of kinship between himself and his potential victim/s.
My other assumption--he bolts to a country without an extradition treaty in short order.