Great cultures and civilizations start down the path to ruinous downfall when their government’s start taking from the productive to buy the support of their populaces. From Jeff Thomas at internationalman.com:

Just as people go through a lifespan that consists of different stages, so empires tend to follow a pattern of stages.
They tend to start off slowly, making progress as a result of industriousness, understanding that progress is dependent upon hard work and an entrepreneurial spirit.
This is important to understand, as it’s the one essential in the growth of a nation. No nation becomes an empire through complacency or a lack of productivity. Welfare states do not become empires, although most empires end up as welfare states.
So, if that’s the case, what is the progression? And more importantly, what does this mean, considering the dramatic changes that are now unfolding in much of the world?
Prosperity
As stated, prosperity is created through a strong work ethic and an entrepreneurial spirit throughout a significant portion of the population. This is what brings about wealth creation – a condition in which people invest their time and money in a business enterprise that reaps profit. The profit is then re-invested to expand upon that success.