Is there an example of an emperor not being present during a distribution of money to the people of Rome?
I think
Hadrian is attested to have distributed
his first
largesse to the
Roman people in 117, while he was
still absent in the East.
However, he didn't commemorate this distribution at all on
his coins, let alone use the platform-scene
type!
Another example is
Max. Thrax, who distributed
his first and only
largesse in 236, though he apparently never made it to
Rome during
his reign.
Yet
Max. Thrax did use the platform-scene
type on
his coins! So we have to admit that that
type is not irrefutable evidence of the emperor's presence in
Rome.
Since it was the emperor's
largesse, and he was there "in spirit", he could be shown sitting on
his curule chair in the platform
type, even if he was in fact not there, and the
largesse had just been distributed by
his officials. (Or
Max. Thrax did make it to
Rome to assume the consulship on 1 Jan. 236 and distribute a
largesse, but no literary or epigraphical evidence of
his visit has come down to us, just the consular-quadriga and platform-scene coins!)
There was a strong connection between the emperor's presence in
Rome and
his distribution of
largesse, as we can see for example from Dio's account of the crowd's begging for a
largesse after
Marcus Aurelius' return to
Rome after a long absence fighting on the Danube. When
Marcus admitted that he
had indeed been gone a long time, the crowd shouted back "Eight years!" and held up eight fingers, hoping for a gift of eight
aurei or 200
denarii per man!
When Avidius Cassius rebelled in 175 while
Marcus was fighting on the Danube,
Marcus had Commodus distribute a
largesse in
Rome before joining
Marcus on the Danube for the expedition against Avidius. On the coins,
Marcus used only the Liberalitas-standing
type for this
largesse,
his sixth (BM pl. 65.13), while
Commodus used
both that type and the platform type, the latter showing however just Commodus seated on the platform, not Marcus and Commodus together! (BM pl. 66.4 and 9, pl. 84.14). So in this case the coins reflected very precisely who was in
Rome to distribute the
largesse, and who on the other hand was absent.