The Post's editorial "Cab Controls: A Breakdown" {Aug. 1} soundly trashed a majority of the panel on rates and rules of the D.C. Taxicab Commission, myself included.

The editorial concluded, "If the commission members insist on having tantrums and collecting per-meeting stipends for doing nothing, Mayor Barry has got to move in and set his appointees straight." I would heartily agree. But I would simply point out that Chairman Arrington Dixon is one of those appointees, and the only one who is a full-time employee of the D.C. government and who serves at the pleasure of the mayor.

As a lead editorial, I would suggest that it, at least, should have been researched to determine the underlying facts. Contrary to the editorial's implication, Mr. Dixon faces no bureaucratic roadblock except himself. Any delay or stalling in adequate regulation of the industry can be attributed to him. Mr. Dixon refuses to acknowledge that if the D.C. Council had wanted a single commissioner, it would have said so in its legislation.

The dichotomy between the chair and this "obstructionist" didn't start yesterday. It started the day the commission was confirmed and appointed. Mr. Dixon ignored my serious concerns until others began to voice similar ones. He could have taken his "problem" to the mayor or to the chair of the Committee on Public Works of the D.C. Council at any time, but he didn't. He prefers to rely on public outcry to support bad regulations and worse government. In doing so, he may just find himself caught in his own trap.

The commission has only been appointed for five months. I am prepared to account to the mayor, the Committee on Public Works, the public and the taxi industry for my efforts during those five months. I wonder if Mr. Dixon is prepared to do the same.

JOSEPH F. BECKER Washington