You could certainly do such a survey, or possibly even test the variable relationships with existing data. Personally, I always think critically about what factors could mediate the way someone answers survey questions in a certain way or other. Social desirability is the major bias I've read about lately in which people tend to answer questions in ways that they think would make them socially desirable. This could be part of a deeper and more general pattern where people literally convince themselves that things that are supposed to make them happy in fact do, because others would judge them if they didn't say so. Imagine someone who has a big house, nice car, great job, high salary, fantastic spouse and family, etc. complaining that s/he is unhappy despite or even as a result of so much wealth and income. Imagine that person writing on a questionnaire or telling a survey interviewer, "well, none of it really makes me happy because my spouse doesn't really love me, s/he just goes through the motions because it works so well economically and socially."What about using that technique for something like this? Check for a correlation between the amount of money one makes and the happiness scale 1-100, then control for third variables such as friendship? For example, I've heard of friendship quotients (like an intelligent quotient but rather how deep vs. shallow friendships are). Perhaps other measures also?
People don't even admit that kind of thing to themselves, usually, let alone a survey. Personally, I think in depth case-studies always provide more valuable information than survey data, but what is the harm in doing a survey if you put ethics first, etc.? I'm guessing with in-depth interviewing you would get people saying how love and friendship did provide comfort to them during financial loss, and others who say their friends and lover abandoned them when they started living on PB&J and stopped wearing nice clothes or going out. You might even find that some people maintained love and friendships but it wasn't sufficient for them because they lost self-esteem (self-love). There are so many empirical possibilities.