Everybody has their own obligations.
A parent’s obligation is to support the people who are moser nefesh to teach their children.
A rebbe’s obligation is to do what is best for his students. It is not best for his students to make them feel bad for their parents’ inability to pay.
Any school which feels it can only operate in this way should close down. Are you trying to help klal yisroel, or trying to secure yourself a job which doesn’t come with the guilt of leaving learning?
Who was expecting that from me?