You have rightly pointed out that people are becoming more materialistic in this age on account of their forgetfulness of Krishna Consciousness. Actually there is nothing like materialism. Materialism means forgetfulness of Krishna or God. We are preaching therefore Krishna Consciousness. In the Srimad-Bhagavatam it is said that the first-class religion is that which teaches love of Godhead. At the present moment, one professes a type of religion, but does not develop real purpose of religion, namely love of Godhead - that is materialism.
Letter to Sri Birlaji, 23 April, 1970