Happiness is that every human can live a life that at the end of days he can call "cool" - for some that means family, for some that means hording stuff, for some it means eating rare stuff, good tasting stuff, for some it means Internet or porn, or many women, or many men, or even many children and all of the above, or heck for some it means being lazy, watching Anime and playing weird Otaku culuture related Tohou games ;P
One can live any such a life with even a fleeting attempt at abusing capitalism and how it works. But one can never achieve most of such a life living in system like socialism as i knew it. Now of course its a fact that most practiced socialism is in fact a misnomer (Germany and Norway are not practicing socialism, but social capitalism!).
But real socialism and communism (particularly both together) are absolutely prone to abuse, not because the systems in their own right are flawed, but because any such system on a nation scale requires supervision by flawed humans, who don't live in socialism or communism but in egomanism. Which is my term for people who "abuse a system to gain the maximum profit for themselves and their ~relations~".
In Capitalism, the reality is that BECAUSE humans do this Capitalism largely still works, even though an african or north korean might very well scoff at such a statement. Reality is that as long as theres Nations to be oppressed by sheer force of economic power, exactly that long Capitalism will exist.
And that will be a very long time still. As the average education of say, someone living in Bangladesh coming from a farm, and working 7 days a week for 14 hours in factory, is.. lets say, "low" - not becaues the humans are stupid, but because the system in place actively denies them education in order to exploit them. What a fucked up world it is. But it is the world that puts food in the super markets...
Not much else to say, remember Socialism is NOT social capitalism.