Investors and lenders play an important role in the economy. If theft makes what they do impossible it will cause a drop in the total productivity of the country as a whole. Which is to say stealing from them, especially at scale, is likely to cause far more starvation than it will solve.
Your idea has been tried: the peasants were hungry, it was the Kulaks with the excess food and money and the process of taking it from them was called dekulakization. Between 500,000 and 5,000,000 people died. This also led to the Holodomor with its estimated 7.5 million dead.
This all started with the observation that there were rich people and poor people right next to each other, and that taking from the rich to give to the poor must be a good thing. But it turned out to be one of the worst events in human history.
https://en.wikipedia.org/wiki/Dekulakization https://en.wikipedia.org/wiki/Holodomor