> These types of projects aren't likely to get publicly funded because too much of tax revenue is now required to be spent on entitlements
That depends on how you use the term "entitlement." If you are referring to social security and medicare, you're off base because people literally are entitled to those programs after having been forced to pay into them.
If you're talking welfare in its various forms (for the people who are just lazy, not those who legitimately need it), pork projects, warmongering (welfare for Haliburton, etc.) then you're right - if we slash that wasteful spending then we could easily afford to explore the solar system and maybe even investigate "warp" technologies which have been legitimately theorized to be possible but impractical given current tech. Or, we could be spending the savings on green energy or fusion, since there is no legitimate reason energy should not be free for everybody on the planet by now.