Technology can only do so much.
Eventually, you have to put boots on the ground and when that happens, contact is established, lives are lost.
How will you drive MPV's through un-motorable areas? You will have to alight and move on foot. You are on equal footing with the hunted.
Whoever makes the first move, scores.
To say that Naxals are getting money from China, ISI etc is being shortsighted at best as it forms only a tiny fraction of the funding. Most of the funding comes from extortion. Everybody pays. From the beggar, to the Govt. teacher to the tourist cab plying the stretch to the mighty corporate Tatas to Vedantas to PSUs.
Then you have marijuana funding the insurgency too. Deep inside the forests, there is no way to know whether the tribals are growing marijuana between their sunflower or paddy crop. People don't even venture off the road, who will visit those villages?
Most of the marijuana being smuggled into South India is grown in the Orissa-AP tribal belt followed by Kerala(Idduki and other Left strongholds).
AP-Orissa belt is the hub of marijuana cultivation.
If you take a cab from Vizag/ Vizianagaram to Koraput or Orissa border, the cab drivers are often stopped enroute, given tiffin boxes, parcels and told to drop off at a roadside hotel or elsewhere. No, not all of them carry food.
In NE too, its drugs and poppy cultivation that's keeping the insurgency going.
Same in Afghanistan, South America, Ceylon, South East Asia, you name it.
Your high comes at a price that some poor soul pays with his/her blood.