But you should disqualify everyone for whom no need exists, what does it mean?

This means that individuals or entities should only be considered for a particular opportunity or benefit if there is a genuine need or requirement for their participation. Those who do not have a legitimate need should be excluded or disqualified from consideration. This ensures that resources are allocated efficiently and fairly to those who truly require them.

The phrase "But you should disqualify everyone for whom no need exists" means that you should remove from consideration anyone who does not have a genuine need for the thing being offered.

For example, if you are giving away free tickets to a concert, you might want to disqualify anyone who already has a ticket or who is unable to attend the concert due to a prior commitment. This ensures that the tickets go to people who will truly appreciate them and who will be able to use them.