Answer :
The correct answer to this question is the following.
Unfortunately, you forgot to attach the quotation. Without it, we do not know what is its content, just you know it.
However, trying to help you we did some deep research and can comment on the following.
What G. W. Plunkitt describes as honest graft is "using inside knowledge to profit from city construction projects."
Plunkitt and Boss Tweed achieved great power through political corruption.
This political machine was based on corrupt practices. Too much money and concessions were given to maintain its political power. The political machine had a big influence in the Democratic political circles and dominated New York City from the mid-1800s to 1934.