Are there poor people who abuse the welfare system to get money? For sure.

Just as there are bankers who abuse the financial system to get rich. (I recall a certain former president bailing out banks as his last act in the presidency.)

Just as there are politicians who abuse donations and lobbying to fatten their pockets with money. (I recall a certain vicepresidential hopeful getting thousands of dollars in clothing and travel expenses. Let alone congressmen and senators having their palms greased by lobbyists.)

Just as there are businessmen who abuse the government "outsourcing" system to ensure their companies get lucrative contracts. (I recall a certain vicepresident ensuring that Hali-something got overpaid in Iraq.)

As long as there is easy moeny to be made, there will be people who abuse some system or another. It is all a matter of scale. A poor devil on welfare takes thousands, a rich devil in office takes millions, an even richer devil in business takes billions.