Just a few observations on the loading aspect..
The planks as used in the picture look dodgy,,It is more common to have several long planks stacked in alternating directions. For this applications It would have been better to have used wooden-beams, at least 6 x 6.
Aircaft holds like the 747F are ULD systems, the cargo is loaded into an 'Unit Load Device' (pallet or container) which is then loaded on the airplane. The aircraft floor has rollers/rails which spread the load onto the aircraft frame. The standard pallet is dependent on ULD lock/restraints.
Civilian aircraft take 96/88 x 125ins pallet. Military pallets are 88 X 108ins. Some aircraft have locks which can accomodate both, (I know Fedex DC10s could do this). If they loaded mil spec pallets on a civilian configured aircraft, the pallets would need to be lashed down.
For unusual items, tiedowns to the aircraft proper can be used but the limiting factor is what the floor can take in that area. On 747 it is usally highest in the wingbox area. Most positions have max wt of 6780kgs(ish) but the positions at the wing box are significantly higher. Nose and tail positions have the lowest capacity.
Coming back to the picture in the jeep, I would definitely double-check the loading and tie-down of that vehicle if it has already flown,, the potential of the planks to 'slip' during the take-off /landing is unacceptable. Consider also that it will have moved back and forth during the take-off and subsequent landings there 'will' be some slack and this needs to be checked.
Finally all the straps need to be tightened to similar tensions, otherwise the tight ones will be taking the load, leading to progressive failure.
Another thing that is easy to miss is that each tie-down location has a limit, and while you can attach several tie-downs to one fitting, they cannot exceed the limit, example you may have one strap running forward and one running to the rear, as they will never come under both forces at the same time this is acceptable. Looking at some of the pictures it is a nightmare and needs time and a systematic approach to get it done.
Not sure how the situation in Camp bastion, but this is not a 1 hour job. The fact that this is a military job and loaded by the military helps as they are generally a professional and well motivated lot with excellent equipment, but if they were working to meet crew duty-times then they may rushed it.
I don't get why some are so fixated by brakes/transmission in park. A car/truck/MRAP has limited contact area of its 4 tyres, if you are depending on four tyre 'footprints' to hold a load on a metal surface then good luck to you.