I have worked with Deloitte on two projects (on clients' side, I would never willingly work for Deloitte). Generally expect them to do absolute minimum necessary to meet the contract. The code was obfuscated to ensure support contract. The people employed to write it were not interested in the quality in the slightest but were interested a lot in specifics of the contract.
Serious question: why doesn't the government have its own internal software development department at this point? One that's familiar with all the regulatory and bureaoucratic hurdles and the legacy systems, but doesn't have the incentive to grift. For the amount of money they spend on these contracts surely they could afford to pay competitive salaries?
How much does it cost to get a qualified person to put up with all that though?