In "Dusk" by Saki, what is the meaning of "jostling ranks of those who enjoyed prosperity or struggle for it?"

In "Dusk," by Saki, the narrator shares the main
character's disposition. The reader understands what Gortsby is
thinking:

So
Gortsby's imagination pictured things as he sat on his bench in the almost deserted
walk.

Gortsby believed the
defeated came out at dusk. He is feeling defeated at the
moment:

He was
in the mood to count himself among the
defeated.

If the defeated
show up at dusk, why is Gortsby out at this time of the evening? While some people who
come out at dusk have money problems, this is not the case with Gortsby. He did not have
financial issues:

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Money troubles did not press on him; had he so
wished he could have strolled into the thoroughfares of light and noise, and taken his
place among the jostling ranks of those who enjoyed prosperity or struggled for
it.

In this passage, jostling
means to push or shove or to brush shoulders or elbows. Gortsby can fit in with the
wealthy who brush elbows in upper class events. The jostling ranks would be the upper
class people who enjoy money, those who rub elbows because of their prosperity. The
jostling ranks consist of people who attend upper class events because they are wealthy.
The jostling ranks have money through inheritance or through a struggle of hard
work.

Gortsby is thinking that he can push and shove with
the best of those who have money. He can brush shoulders or elbows with those who enjoy
money or struggle for money. In other words, money is not the issue. Gortsby can hold
his own when it comes to financial situations. Gortsby has
money.

Gortsby is sitting on the park bench for another
reason. He is preoccupied with something, but it is not a money issue. He can take his
place with those who rub elbows in high ranked positions of
society.