"By the President of the United States of America: A Proclamation," Nov. 26, is a thinly veiled political device. And how hypocritical for a president who has done almost nothing for the lower classes to declare: "In this great Nation, we have a special obligation to care for the ill and the destitute as if the president has no power on the national level to help the poor and needy. True, individual help is needed - and always has been given - but the president should do his best to implement the wishes of the people, a people already committed to helping the poor. Andrew S. Blander, Beaverton, Ore. Letters are welcome. Only a selection can be published, subject to condensation, and none acknowledged. Please address them to "Readers Write," One Norway St., Boston, MA 02115.