It's apparent to me that as society becomes richer it becomes more socialist. The reason I think is that the cost of socialism becomes relatively less and therefore more tolerable. My favorite example (because I made it up) has to do with bread.
Let's say we are a poor country and everyone has one loaf of bread. There is no extra food, that loaf of bread is it and without it, people will starve. Imagine that government comes along and demands 10% of that bread. What do you think the reaction will be? Obliviously people will resist. Their choice is between living and paying the bread tax.
Alternatively, society becomes richer and everyone has 10 loaves of bread. It only takes one to live, the rest makes you a fat American. If the government comes along and demands 10%, what will your reaction be? You'll probably give it to them. The cost of resisting is more than the cost of being a bit skinnier. I imagine that you wouldn't protest even if the government demanded 50% of your bread. Certainly not as much as when you only had one loaf.
While affluence is something we all desire, it is also an anathema to liberty. Wealth raises the cost of opposing encroachments on liberty. One would go to war to protect his daily bread. No one would go to war to guarantee he had six loaves of bread instead of five. The only way to ensure liberty is to raise the cost of the encroachments upon it.