In government, it’s not just a matter of having the best policy; it’s about getting enough votes. This creates a problem when the self-interests of individual voters don’t match the best interests of the country.
For instance, voting researchers widely consider the presidential voting system in America to be inferior to many alternatives. But if you want to change it, you require consent from Democrats and Republicans—i.e. the very people who benefit from the status quo.
Or consider the land-value tax. This tax is considered among economists to be uniquely efficient (i.e. it causes zero reduction in the good being taxed). When implemented correctly, it can address edge cases, such as new property developments, and can even prevent reductions in new land production, like the creation of artificial islands. However, this policy is against the interests of current land owners. So any politician who advocates this policy would not only fail but also likely end their political career.
What do these policies have in common? Well, both policies yield long-run benefits, and as we’ll see, they impose short-run costs. (If you disagree that these policies are actually beneficial in the long run, I’m sure you can think of policies that you like that have long-run benefits and short-run costs. The examples I’ve given are simply for clarity.)
What if rather than asking American politicians to vote against their own interests, we ask them to pass a policy today that will only be enacted after a 100-year period? Significant advances in medicine notwithstanding, by that time, most of today’s politicians will be dead. In other words, they no longer have to vote against their own interests.
The same strategy can be applied to land value taxes. If today, we passed a policy for a 100-year delayed land-value tax, the effect on house prices is approximately zero (see the widely-accepted net present value model of asset prices).
I believe this strategy offers a significant opportunity. Policy in the EA community is often seen as too hard because of how crowded it is. Yet almost no policy makers are thinking about the future in 100 years. It might be possible to pass a lot of “unpassable” policies. We just have to ensure the policies we propose are actually good (see my unfinished series on the topic), and have large barrier to reversal, so that the politicians of the future can’t renege on the government’s commitment when the day of implementation arrives.
I have a follow-up post here: Enforcing Far-Future Contracts for Governments.
Depends on domain we're talking about. The post I linked in the last paragraph will probably answer your question in more detail than you'd ever want, but I'll answer it briefly here.
I'd very happily back the two examples that I gave. And that's because we can define reasonable optimality criteria for each of those areas (voting systems and tax policy) and show that our policy proposals satisfy those criteria under some reasonable assumptions.
The key point here is that, for the land value tax, the optimality criteria and the assumptions required are extremely weak, i.e. every person informed on the matter would agree with them.
For the voting system change, there's actually a proof that you can't satisfy all the conditions that you probably want for that system (Arrow's impossibility theorem). So in that example, there could be reasonable debate about which property set we want, but I'd be happy If America changed to any number of proposed voting systems. For an introduction on the topic, see CGP Grey's video.
This delay strategy is definitely a last resort. If you can implement a good policy today, then do that. But if you face insurmountable road blocks, and you know the policy is optimal (by some reasonable definition), then it may very well be the best option available to you.
As for the 1923 question, I'd say we didn't have a theoretical foundation for what makes a policy optimal. Given that, there is no policy I would have tried to have advocated for in this way (even though the land value tax was invented before 1879). The article that I linked you to contains my attempt to lay those theoretical foundations (or the start of it anyway, I haven't finished it yet).