A country can subsidize the bounties of plunder victims of their nations, be 10% to 100% of the bounties due the victor. A 50% subsidy for Admirals would cover 50% of his bounty losses if plundered.
Option 1) Minimum Title of Citizen (captain and above, admiral and above, etc.)
Option 2) Percentage of Subsidy 10% to 100%
Option 3) Subsidy limit (The most per individual per day)
Option 4) Percentage of treasury available (10%-100 % of the funds in the treasury available for this program.
Spastic's Plunder Tax would compliment this law very well.