When we become a non free country, you would be able to take whatever you want from the rich, you will be able to demand they do not buy what you deem frivolous luxury items or that anyone produces them. When we become a non free country, you can invent things for scientists to solve.
But wait, no you cannot because the chances of you being the supreme dictator of this non free country would be about zero. What we will end up with is the same as every single other communist country- an elite few muddled with various levels of corruption and brutal enforcement of their demands to do what they decide is best for you. We may even end up killing thousands if not millions of people in order to make it happen just like in almost every other start of communist ruled countries. You may think, oh noes, couldn't be because this time we will get it right those with more will have less and it will all be unicorns shitting rainbows all over the place, and then they take your Iphone because a nokia flip phone is good enough and everything else is a luxury. Then they take your computer because it wastes electricity and they deemed you do not need it. But hey, that's an ideal world right? Someone making arbitrary decisions about who can purchase what, about who works on what and who can produce what, all based around the whims of someone who doesn't like people with more money than them.