It's not all because of fraud. There's also a lot of crossover between the people defining the programs and the people administering the programs. So programs

It's not all because of fraud. There's also a lot of crossover between the people defining the programs and the people administering the programs. So programs get rules written in a way that the software from the firm they are close to can handle it, but are hard for their competition to work with. None of it is actually defined with the taxpayer and beneficiary's interests at heart. (Source: worked for an agency in the space and saw it first hand).