They can glean where the absurd amounts of money that our government has been wasting on completely ridiculous things has been going for decades.
Yeah there was a probably a nicer way to do what they are doing but given how slow the cogs of government turn this is probably the "better" way to achieve what they are looking for. By rushing through the door and looking at as many things as possible they are essentially overwhelming the system with speed. By the time the law and due process catch up they will have already reported back all the many, many ways the government has been basically burning our tax dollars on shit we never voted for while telling us there is no money to be had for the things we have been asking for.
I understand the worry that this is coup and I will likely be downvoted for this comment, but if you choose to believe that they are actually trying to trim the fat this was going to be the only way they could get that much data without having to slog through miles of red tape and Democrats trying to block them from digging into financial records the entire time.
They have already uncovered so much insane spending that im actually concerned how bad it's going to get as they dig down further. The Democrats were doing exactly the things they constantly accused the Republicans of doing for years. They were directly paying politico to report what and how they wanted. They were using USAID primarily as a tool for meddling in foreign governments and hiding behind it being a global aid organization (the money spent of being used as a shadow government nearly doubles what I USAID actually spent on giving aid).
Seeing as there is nothing I can do about it as an individual I am choosing to sit back and watch it unfold. Worst case out country folds itself in half and things get spicy for awhile. Best case we cut wasted spending and government bloat significantly while also shining a light into all the dark corners of government that the public has never even been made aware of.