You don't understand.
People with rank "Full Member" and higher don't want to give merits for the people which rank is Member and lower. They are not interested in it. It's a competition! Higher rank means higher rewards and others advantages.
This is not quite like that. I have already got 20 points for like 10 days, and I'm pretty sure there are many like me. I see Jr.Members with more Merit than me, and when you read the merited comments, it make sense.
You don't really need to spam around to generate useless posts or begging/"butlicking" the "big ones". There are many services where you check what people think of your"quality posts" and compare your type of thinking with the community. Not everyone know what quality post means.
Many people don't realize but this Merit system is actually improving a lot of things in your personalty >
-Your way of thinking and analyze things.
-Improving you language especially for NNESs
-Improving communication skills by contributing to the community.
etc.