Nothing but opinion follows. Take due notice and govern yourselves accordingly.

If we're talking a database administration job working anywhere outside academia (or evidently, the government), the degree itself is unlikely to go anything for you directly, at all. I was the primary hiring point for a team of DBAs and database developers for about 6 years. I never even looked at people's educations. I didn't care. I cared about real world, demonstrated experience. Whether or not you have a thorough and complete grounding in all aspects of database theory doesn't mean a darned thing when I need a recovery run at 3am. Sorry, but that's the truth of the matter.

Now, if we're talking the very small area of data scientist, whether in research or in business, then I think the masters degree can absolutely help. But, only if it's in the area of data science. If it's some sort of general data theory degree, then we're back to useless again. But there, you may be better served by going on to get your doctorate.

Education, for educations sake is fine. But if you're looking at this as a "will I make more money with the masters than without it" situations, in most circumstances, I'd say no.