Mother found that this year the flies are fewer than the last. I think we should owe this to the rubbish cleaners who continually remove the garbage from the dump in our neighborhood. If not so, the environment around us would be quite different and unbearable. It's really unfair for them to be so underpaid while their work is dirty, heavy and necessary. They are doing the work of public servants but they don't earn as much as the government officials who are honored with the name. It is these true servants of people who should deserve our respect and gratitude. In reality, they are suffering all kinds of discrimination. And the position of those so-called public servants is envied and pursued desperately because it is profitable. Here we can see how human nature is contorted by the social injustice.