I read some years ago about this problem in a paper. They solution they had was this: 1. Make buckets of "pays", say 80-85k, 85-90k, 90-95k, and so on, you can

I read some years ago about this problem in a paper. They solution they had was this: 1. Make buckets of "pays", say 80-85k, 85-90k, 90-95k, and so on, you can decide bucket length 2. you have two people at hand. we will come to know if there is a wage difference between these two. 3. put box in a room, send one person in, with a chit, ask them to put the chit in the box with the label of their salary. 4. get the person out, send second one in, ask them to open the box of their salary range and tell if they find a chit or not. If they find the chit, they have same salary and the information is complete. if they didn't find the chit, there is a difference. I am sorry I couldn't find the link or search it back. Hope the grammar/english wasn't too shitty.