Making insider/true expert information public more quickly in the form of influencing prices in a toy market is THE ENTIRE POINT of prediction markets. Read the original papers on them. http://li.mit.edu/Stuff/CNSE/Paper/Hanson90.pdf https://www.jstor.org/stable/3216893 https://mason.gmu.edu/~rhanson/insiderbet.pdf
In particular: the government is free to just publish any insider/true information that it wants the public to know about. If it shared that purpose then the market wouldn't need to exist.