I was thinking why not use the alpha-gamma mechanics for both where dominating choices are rewarded by giving new possibilities but closing others would not be an easy way but it would be a nice one.
Taking advantage why not join gossip to escape from your debtor or ask for support. It would not be easy but maybe it would be safer although this will depend on the relationship with gossip and how secure the characters are being below the hierarchy or taking an important role if you have done work for them and have a good relationship with the leader.