  We link the lack of FR I type structure among quasars to the void of radio
loud quasars below a critical disk luminosity of ~10^46 erg/sec in the PG
sample. We argue that the opening angle of the obscuring torus in radio loud
quasars depends on the power of the central engine, approaching the jet's
beaming angle near the FR I/FR II break. Consequently, low power radio quasars
would either be classified as radio galaxies (FR I) or strongly core-boosted
(BL Lac) object, depending on the aspect angle, and no conspicuous transitional
population would be expected for FR I sources. A closing torus with decreasing
power would not only obscure the optical nucleus for most aspect angles but
would also enhance the entrainment of the cool torus material into the jet
stream, causing obscuration along the jet's periphery, as well as the jet's
deceleration to form a FR I source. Above a critical luminosity, the wider
torus allows for FR II type jets and visibility of the nuclear optical
emission, characteristic of radio loud quasars. Apparently, at the same engine
power the torus opening in radio weak quasars and Seyferts is substantially
wider than in radio loud quasars, probably because of different dynamics or
feeding mechanisms in disk and elliptical galaxies. This provides a clue for
the radio-loud/radio-quiet dichotomy of quasars if the the jet/torus
interaction leads to injection of relativistic e^+/- pairs via p-p collisions.
Strong jet/torus interaction may lead to a substantial injection of secondary
pairs and collimation in radio loud quasars, while weak interaction in radio
weak quasars leads neither to pair injection nor to good collimation.
