There's no such thing as a utopian society. Something always comes at the cost of another thing. If we want to fund schools better, we have to pay higher taxes. It's not like Democrats think that money can be pulled out of nowhere to pay for social programs or anything like that. It's that we think those things are important enough to offset the cost. It all comes down to what you value. Democrats tend to value people's well being, not a couple of extra cents in everyone's pocket.
I don't think anything will ever even come close to being perfect. There's just way too many people. Not everyone is going to be happy. Things will knock back and forth from one extreme to the other, sometimes settling in the middle for a brief moment before someone gets greedy and knocks it back.