[Syonyk]

"Efficient" in terms of what outputs, for what inputs?

You can't just handwave the term as a synonym for "I think it's better!" - it actually does imply inputs, outputs, and depending on what you want to optimize for, you may get very different results.

If a scythe is genuinely better for the job than a sickle, great!

But in a country without a lot of infrastructure and without modern supply chains, I'm pretty sure a tractor is the wrong solution to the problem. Unless, of course, your problem is "how to burden nations with loans they will never be able to pay back so you can come in and take over."

[troupo]

There are very few, of any, countries without "modern supply chains".