Learn English – How should I refer to ‘people’ that propose a proposal

For someone with money, "wealthy" is the obvious answer (and connotes various kinds of abundance).

For someone with social resources, "influential" or "well-connected." If you want to suggest that they don't often use these resources, but that people would do things for them if they asked, you might need a more specific term describing the nature of their standing, such as "respected," "popular," or "well-loved." If it's just because they're powerful, then maybe "powerful" or "important."

For someone with intellectual resources, a person who knows a lot of things might be "knowledgeable" or "widely-read," or they might be "a polymath," a "jack-of-all-trades," or a "renaissance man/woman." Or they could be "clever." "Clever" is sometimes used as a subtle insult (or as conspicuously faint praise) to refer to someone who has intelligence or problem-solving skills but uses them for trivial things.

You could dub such a breakdown as symptomatic of the Alphonse-Gaston syndrome:

a pair of persons exhibiting an excessive usu. exaggerated politeness or deference to each other esp. about not taking precedence

Origin:

after Alphonse and Gaston, characters displaying excessive politeness and often uttering the phrases “after you, my dear Gaston” and “after you, my dear Alphonse” that appeared in the comic strip Alphonse and Gaston by Frederick B. Opper †1937 Amer. illustrator and cartoonist

Wikipedia expounds thusly:

The strip faded from public view shortly after Opper's death in 1937, but the catchphrase "After you, my dear Alphonse" lived on. It continues to the present day, spoken in situations when a person receives a dare to do something difficult or dangerous or both; the catchphrase returns the dare to the person who made it. Sometimes it is said when two people are simultaneously trying to go through the same doorway and awkwardly stop to let the other go through.

Alphonse and Gaston exchanges have also been employed by sportscasters during baseball broadcasts when two outfielders go after the ball and it falls in for a base hit. Shirley Jackson used the phrase as the title of her short story, "After You, My Dear Alphonse," published in the January 16, 1943 issue of The New Yorker.

The phrase "Alphonse-and-Gaston routine", or "Alphonse-Gaston Syndrome", indicates a situation wherein one party refuses to act until another party acts first. From a September 23, 2009, New York Times editorial: "For years, China and the United States have engaged in a dangerous Alphonse-and-Gaston routine, using each other’s inaction to shirk their responsibility."

I also ran into a loosely related term named xenocentrism:

oriented toward or preferring a culture other than one's own