Unfortunately, I really do mean "dictator" as we'd need to sustain a lot of R&D for a long time (much longer than a two-term US president for example), and even nations can't afford to spend a huge percentage of their economy on long-term projects so it has to be a fairly limited % of the overall money supply for that period. And one needs to be extremely cautious, no speed-running: a nation cannot afford to have a thematic repeat of the Apollo 1 fire with e.g. a 2000 km long Lofstrom launch loop: https://en.wikipedia.org/wiki/Launch_loop

There's three options for that size of economy:

• The US space industry comes in two parts, (1) a jobs program ("Senate Launch System" etc.) whose stated goals change with almost every new president, and (2) New Space (where Musk got the lion's share, but now he showed what is possible the whole world is quite capable of following the same path). Neither half of this lends itself to an R&D program on this scale.

• The EU is not one nation, it's a glorified free trade area. The EU's budget independently of the member states is nowhere near big enough to consider this.

• That leaves China; they could, I think, if they decide they want to. Will they decide that? I have no idea. Fits belt-and-road, but they may consider it a pointless boondoggle.

To live on Mars requires a level of autonomy and self-sufficiency that I don't think we know how to do.

On the Moon we can learn but we have softer requirements, and we can still have near real time comms. Anything further and it's "you're alone, no-one can help you, no-one will even hear you in case of emergency". Faster transportation isn't going to fundamentally change that unless it's near Star Trek level.

IMHO, the rocket is just a small part of the problem.