Even if you weren't turning 90 gears at once, any extra gearing adds extra weight.
There are frictional losses in the engine, transmission, rear end, every bearing, and where the tire meets the road. Of course the heavier the vehicle, the more load there is on EVERY previously mentioned part. The faster you go the more you lose to air drag. The more your engine, transmission and all the bearings heat up the more you lose to friction.
If you could eliminate any one of these losses you might have something.
The engines in the high HP drag racing cars only have to perform for seconds at a time and even at that they don't last very long.
Your point about being able to move a large item simply by putting it on a pallet jack is valid as you have reduced one thing significantly and that one thing is friction. But even with friction reduced you are still limited to a certain speed when you move something in that manner. Larger tires and better bearings may help but you will still be limited by horsepower.
Even if you were able to pull it at a higher rate of speed then air drag would kick in. What could overcome that? Well a couple of things, horsepower and aerodynamics.
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