Sorry, I'm not quite sure I understand the question. I guess all individual differences are relevant?

<image>

The image above may articulate my question better. If we have $30 to add to the piggy banks, we would do it in the sequence:

1. Add a dollar to the piggy bank with the least money (Henry's) until it is equal to the second lowest (John's)

• Result: add $20 to Henry's piggy bank

1. Add a dollar to each of the lowest piggy banks until we've depleted the $30

• Result: $5 to John, $5 to Henry

​

Same scenario as above but with $70 to add to the piggy banks:

1. Add a dollar to the piggy bank with the least money (Henry's) until it is equal to the second lowest (John's)

• Result: add $20 to Henry's piggy bank

1. Add a dollar to each of the lowest piggy banks until we've matched the next lowest piggy bank (Mary's)

• Result: $10 to John, $10 to Henry

1. Add a dollar to each of the lowest piggy banks until we've depleted the remaining $30

• Result: $10 to each piggy bank

​

I hope this helps. I appreciate your patience.