Corruption is actually everywhere, but it started with the government, if the government is corrupt, then most probably the government are not good in implementing the law and that sectors and community will be corrupt as well, it will run in the system and everyone will be corrupt, and those people who are at the bottom will suffer from the greediness of the corrupt people.
Yeah, it's like a river on the top of the mountain where it flows around it before reaching the bottom. When the water is clean from the top, it goes all the way until it reaches its destination. But if someone is corrupt and will try to pollute the flowing water, it will become polluted but will soon be clean again because, from the top, everything is all right. When the top is corrupt then expect nothing good when it reaches the bottom. luckily we have a government that doesn't tolerate such bad acts and punishes everyone involved as soon as they are found guilty.