SR22 SAFETY PLT RPTS A LACK OF ATC INSTRUCTION AFTER LNDG AT MRY WHICH INITIATED A POTENTIAL TAXI CONFLICT WITH A TAXIING ACFT.

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ARRIVING MRY; ON SHORT FINAL; HEARD ON TWR FREQ INSTRUCTIONS FOR TAXI GIVEN TO ACFT #2. ACFT #2 INSTRUCTED TO TAXI ON PARALLEL TXWY TO THE ACTIVES (RWYS 28L/R). I WILL ASSUME TWR CTLING BOTH GND AND TWR AS I DID NOT HEAR A REPLY TO THE TAXI INSTRUCTIONS. DURING ROLLOUT; I POINTED OUT TO THE PIC IN OUR PLANE; ACFT #2 TAXIING ON THE PARALLEL TXWY. I ALSO POINTED OUT THAT THERE WAS LITTLE SPACE BTWN THE HOLD SHORT BARS AND THE TXWY. ALSO; I HEARD ANOTHER JET CALL A 5 MI FINAL. AT THIS POINT; IN MY OPINION; WAS THE SAFETY ISSUE. THERE WAS NO INSTRUCTION BY TWR TO US OR ACFT #2 TO RESOLVE THE FORESEEABLE CONFLICT OF US (ACFT #1) EXITING THE RWY AND BLOCKING AND/OR COLLIDING WITH ACFT #2 TAXIING ON THE PARALLEL TXWY. AS WE SLOWED AND APCHED THE CONNECTING TXWY THAT CONNECTS THE ACTIVES WITH THE PARALLEL TXWY; THE PIC AND I ALREADY DECIDED TO HOLD INSIDE (IE; STILL ON THE ACTIVE) THE HOLD BARS; TO GIVE CLRNC FOR ACFT #2 TO PASS. AS WE TURNED; TWR INSTRUCTED US (ACFT #1) TO EXIT ON THAT TXWY. TOO BAD ACFT #2 DIDN'T HEAR NOR COULD POSSIBLY HAVE KNOWN OR EXPECTED US TO REMAIN ON THE ACTIVE INSTEAD OF EXITING ONTO THE PARALLEL TXWY. THEREFORE; ACFT #2; AS A PRECAUTION; MADE A HARD STOP SHORT OF THE INTERSECTING TXWY. AND; WE BOTH STARED AT EACH OTHER. TWR THEN TOLD US TO TAXI BEHIND; AND SLOWLY ACFT #2 BEGAN TO TAXI AGAIN. THE TAXI CONFLICT SHOULD NEVER HAVE OCCURRED. WITHOUT INSTRUCTION; TWR ALLOWED THE CONFLICT TO CONTINUE; RATHER THAN PREEMPTIVELY RESOLVING THE SIT. FOR EXAMPLE; TELL ACFT #2 TO HOLD SHORT OF THE INTERSECTING TXWY OR TELL ACFT #1 TO EXIT BEHIND ACFT #2.