It is easy to argue that objects fall at the same speed in vacuum, regardless of mass. Just imagine two identical uniform cubic bricks dropping from a height. Since the two bricks are identical, they drop at the same speed. Now imagine placing the starting bricks closer and closer to each other, until eventually they join up. The resulting brick has twice the mass of the originals, and assuming there is not discontinuity in behaviour, it should also fall at the same rate.

Similarly, imagine an economy with four people in it – a baker, a shoemaker, a farmer and a blacksmith. The four people sell each other goods at prices that result in no savings or loans. Now imagine another world, except it only has 3 people, and the shoemaker and the blacksmith are now the same person – i.e. the shoemaker/blacksmith makes in total the same things as the two people in the first world, and consumes in total the same amount as the two people in the first world. This second situation does not change the standard of living of the baker and the farmer at all, but assuming equal incomes in the first world, income inequality is higher in the second world.

If I am the farmer, should I care that I live in the second world instead of the first?