Government research grants are for things of wide potential or national benefit. Most of the things highlighted in media as frivolous turn out to be quite different than the headlines imply. Think back to the "rivolous" research into atmospheric lead from car exhaust and other sources, or long-term consequences of smoking, mercury traces in water supply, DDT's effects of birds' eggs, nanoparticle plastics in living cells, etc.
I've attempted to make the American history and economics argument regarding numismatic research for our own country, but have found no interest except in archeology - and that is scant. (U.S. coins are very rarely chronological determinants, and Mint/Treasury documents likewise.)
One would think that at least one wealthy coin or currency collector would fund research, or endow a research position at Smithsonian -- but nope.