As an international relations consultant for the Department of State, I thought that John Kenneth Galbraith's article, "Carrying Convergence Too Far" {op-ed, June 14}, was aptly titled -- for that's exactly what he did. I cannot beg forgiveness for having missed the connection between Soviet moves to liberalize itself from the socialist ethic and the Reagan administration's commitment to bring to Washington some of the most articulate advocates of free-enterprise faith.

Two salient points come to mind in reading Mr. Galbraith's model of how much the United States and the Soviet Union have in common. The first is that the United States has laws and regulations that prohibit certain self-interest activities by public servants. These provisions are constantly being rewritten and have served the citizenry well.

The second point is that the success of so-called Soviet efforts to "escape from the social and socialist ethic" -- i.e., glasnost -- remains to be seen. About the only contribution of glasnost we've witnessed so far has been the forum it has provided to discredit publicly and banish individuals opposed to Mikhail Gorbachev's programs.

I hasten to add this is not the first administration in history to have a few bad apples in the orchard. But suggesting that we have something to learn from the Soviets on the subject of public service is carrying the convergence theme too far. Mr. Galbraith has the gall to state that the purpose of his comments was to suggest the United States has some social concerns solidly in common with those of the Soviet Union. In this instance he is very wrong. JOSE E. V. CUNNINGHAM Arlington