The article "Who's Pump-Priming Now?," Oct. 3, is excellent and to the point.I have long wondered why conservatives do not seem worried about the ever-growing, multitrillion-dollar national debt. Could it be because in a very substantial measure it is owed to them? Tom Doherty, Cedar, Mich. 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.