Indonesia could easily stop the boats.

Budgeted Foreign aid to Indonesia= $A

Cost to salvage a sunk Indonesian boat =$B

Cost of Navy to rescue survivors =$C

Cost to feed passangers =$D

Cost to house passengers = $E

Ongoing costs per person/year*(n) = $F

Unforseen expenses = $G

Resultant aid to Indonesia, $A-$B-$C-$D-$E-$F-$G=$H

Indonesia will bend over backwards to take action.