I don't think it's reasonable to assume they're just going to let GPT write bills with no supervision, especially given that the first sentence specifically says they're experimenting with it.

It's really, really good that they're doing this - this is an incredibly important technology, and the best way for politicians to understand it is to actually use it in their day to day work. Have it write the first draft of bills and see what kind of weird stuff it puts in there - that's how you actually understand the hallucination issue.