Hmmmm... well, I lead some of those groups and I can tell you to some, it IS worth the cost to have somebody guide them through the procedure, get them from the airport to Sarria, book all of their lodging for them, and hire pack transport. Someone to help them book taxis, order their food, and show them the sites.
I don't consider myself a thief at all. I figure what it costs to take 8 pilgrims and divide it by 7. I add a bit on for administration costs. I know other group leaders who do the same.
I know for a FACT there are people who would never walk the Camino on their own without someone to help them plan and even to walk with them.
So maybe calling us "thieves" is a bit judgmental?
People pay what they can afford and for what they want.
Some people have more money than they can spend and they enjoy paying for private rooms, having their packs transported, and having someone else do the planning.
Some feel more spiritual going on their own, sleeping on floor mats, and carrying their packs.
It has been that way from the beginning of the Camino . . .