If you entirely remove money, you now have a problem. You see, when you work a hard job you make more money, when you work an easy job, you make a lot less money. Can you imagine an air traffic coordinator (someone who works one of the most stressful jobs out there but makes quite good pay) given the same food and supplies as a McDonalds worker? I can, and it's not fair, or pretty...
And the way you get there! How are you ever supposed to get to communism if you give everything to something with all the power and all the reason to keep the things, and at the same time, make everyone think they're doing the right thing? Maybe if you did the whole thing democratically, but one small government with all that power ... not a chance, buddy.