Why should Senior Captains be forced to fly with inexperienced FOs? It is not the choice of the said Captains I am sure to fly with the most junior inexperienced pilots in the company. This would be yet another reason for a senior guy to want to leave as every flight would hold a higher risk/threat due to the inexperience.
Prune is become a reliable source of 4th floor whispers, don't doubt the part time idea.
J