bone marrow <span>contains hematopoietic stem cells, which give rise to the three classes of blood cells that are found in the circulation: white blood cells (leukocytes), red blood cells (erythrocytes), and platelets (thrombocytes)</span>
That statement is false.
First of all, the government only cover a very minimum amount to support a minimum way of living. so if the disables want to live a decent one, they have to get a normal job like everybody else
Second of all, the cost of disability not only including the money, but also the disables' lost of many opportunities in the society. Which became a great burden for them