In the movie Taxi Driver, we see Martin Scorsese in two different cameos. The most prominent one being Travis's passenger. This role is credited as "Passenger Watching Silhouette" and we do have a small cameo at the start too.
The passenger cameo is:
Money isn't an issue with him : "I don't care what I have to pay"
However, the first cameo is seen sitting almost on a high pavement of a sidewalk and to be noted is the time of the day: people entering offices, everyone going somewhere,start of the day, busy crossing.
My question is: Is there any link between these two cameos? Is there a background story to this character which transforms from a (presumably non-working, at ease) character to a respectable man who ends up suspecting his wife's fidelity?