I suppose with the virtual guarantee that the politicians will offer mostly cliched responses, the BBC should be looking for more originality and depth from the other guests.
It's a nice 'make yourself feel good' angle to pursue, but did he actually say what was wrong with the current humanitarian effort or what different policies he would like to see? Just said something that pretty much everyone would endorse and got some applause. Brand is out in Beirut i believe later this year as part of his world tour, perhaps he could give part or all of the proceeds to a foundation for those Syrian refugees in Lebanon, Jordan e.t.c.