There's always the other side of the story for each of those parasites. There are poor people but they're not parasites that are opposites to the description that you've given.
There are also rich people who are not parasites and they're living normally and want to contribute and opposites the description that you've given.
The sad truth is that there really are people that don't want to contribute to the economy and going up of a country. They're as is what it is with their living.
I don't like calling anyone parasite. It is based on the simple definition that everyone must contribute to someone else in society, otherwise he is a parasite. That is a communist way of thinking.
Many people born in rich family, they have plenty of resource that can support them for generations, they don't need to contribute to society, and it is a blessing if they don't start a war against another country just because their benefits are hurt
Many people born in poor family, they have no chance to get a good education or job to support themselves, they end up receiving social benefits, it is a blessing if they don't go on street and rob other people