The only problem I ever had with LibreOffice is that (at the time) there seemed to be some inconsistency when showing some PowerPoint-generated slideshows. I suspect the standard is incomplete and the issue is just a matter of matching the expectations of whatever software was used by the person who generated the slides. So, if the officials switch, it is fine.

Anyway, if the government is generating files that require MS office to open, they are essentially creating an undocumented tax, to be paid to a foreign company. This seems… legally questionable (depending on your local laws of course), and wildly stupid.