anything that costs money can’t be a right. for instance the poorest possible society can grant all their citizens the right to free speech, association, religion etc. no matter how poor the society, the citizens can still have exercise those rights. on the other hand if in very poor societies you grant a right to universal high quality education, health-care, nutrition no will be able to exercise their so-called rights for a lack of resouces. now a society may decide that decency requires it to give all citizens health care, a job, etc. but that supposes society has the wherewithall to provide those things. Real rights are independent of society’s wealth.