1. Not everyone is a fluent English reader. If you are providing government services, you have to provide them to "dumb" people as well. "Dumb" in this case includes a lot of smart people who were not raised with English as their first language.
2. There is no official version of the English language. Pronunciations, spellings and style guides change over time.
There are counter-examples, such as AP and NYT, but this usage - without full-stops - is not uncommon or abnormal.
[1] http://www.economist.com/style-guide/abbreviations
[2] https://www.theguardian.com/guardian-observer-style-guide-e
[3] https://www.cam.ac.uk/brand-resources/guidelines/editorial-s...