"I hacked the government's database, and there are tons of confidential information. I opened some, and found many government officials have been bribed by those so-called 'nobles." Si Shui said when Yi Bing and Di San returned without finding a clue, as expected.
Yi Bing, Di San, Liu Lin and Feng Er didn't react. Corruption is normal in any world. Humans are insatiable creatures. Give them one, and they'll want two. It's a never-ending cycle. That's why, humans are embodiment of sins. They represent the six desires: lust, greed, wealth, obsession, fame and pride.
For one, a soul becomes a grim reaper because it has committed a sin in its previous life. They will become a grim reaper to pay for their sins, but whether if their sin will truly be repaid is unknown. Thus, a grim reaper's life is very long, because the time is unknown.