Four levels?

I'm often confounded by my observations of happiness people - I find underprivileged people, such as our watchman kaka, happy most of the time, despite facing every challenge / disaster in the book - and I find healthy and financially fit people complaining all the time. Why is this so?

I analyzed, and found that there seem to exist four levels of intellectual maturity:

1. Subhuman - they seem to have a reduced degree of sensitivity to bad events, probably as they're accustomed to tragedies, and hence small gestures can also make them happy. They hardly know any philosophy or geography or what exists outside their world. They usually believe in God and miracles, which is why they don't simply commit suicide realizing their hopelessness.

2. Transactional - they get happy and sad as reactions to events around them. Their memory is weak enough to let them quickly get over some displeasure by the next material gain. Their interactions with God are also mainly transactional. Their world revolves around themselves, and they don't care much to know beyond.

3. Worried - they (think that they) know about the world, and realize how terrible it had become. Some believe they can improve it, others find those efforts futile. They may show faith and religion, but inside aren't so sure if God really exists. They all have every reason to remain in pain - be it financial insecurity, weight gain, family fights, corruption in the system, bad state of education, global warming or even piracy in Somalia. They mock the ignorant yet envy their bliss.

4. Buddha - those who attain this state enjoy every aspect of the world around them. They know beyond economics and geography and politics - they have and seek spiritual maturity. Faith in God gives them security. They find the variety in human behavior and challenges in the world to be creations of God and delightful means to learn. They seek and find pleasure in opportunities to serve others and enrich the world around them. They practice the true form of nishkam karma. They are always happy.

What do you think about this classification?