Outside influence heavily distorts local economies and needs to be done extremely carefully or you end up making a few people rich and starving everybody else.
Maybe, but not in this case:
> Early data from a sub-district pilot showed sharp reductions in extreme poverty and improved wellbeing with minimal inflation, showing direct cash is a scalable tool to accelerating the end of extreme poverty.
https://www.givedirectly.org/district-scale/
Perhaps things are different in Malawi?
Heifer International presents a good face on doing this by introducing livestock, providing education to the new owners, and imparting an in-kind donation requirement so as to perpetuate and spread the gains.