Economy is the efficient use & management of money & resources. When I efficiently use & manage money & resources effectively, I have enough and that is sufficient.
Resources are what I already have and money is the means of obtaining what I need from other people. With enough money & resources, everything manages to run economically. When a system is run economically, there is always enough money & resources. Without enough money or resources, there is either too much or too little of something, which is not economic.
Having too little requires thrift and savings. Savings are a requirement of a scarcity mentality that believes that because there is not enough, austerity & thrift are necessary. A saving mentality is conservative.
Having too much of anything encourages extravagance & waste. A liberal use of money & resources allows the economy to flow freely. A free economy allows abundance to flow to everyone.
A liberal elite economy allows money & resources to flow only to the rich elite, which makes the poor poorer. A liberal elite needs a labour force to pay for their extravagant luxury of excess riches. It is the enforced labour of the working majority that causes the experience of frugality & austerity, at the expense of a privileged ruling elite.
A class system classifies the inequality of a society that is experiencing the extremes of gluttony & scarcity. The upper classes experience gluttony, extravagance & luxury, whilst the lower classes experience poverty, scarcity & austerity. The middle classes, far from experiencing enough, are still working hard to obtain the perceived benefits of upper class status. There is no true economy in any class system. Any hierarchy restricts the ability of a free economy to flow effortlessly.
The abundance of enough resources & money, which allows economic stability, is realised as a quality when freely & equally available to everyone. It is not economic sense for the endeavours of the many to benefit the few. The greatest risk to any economy is a ruling elite with a scarcity mentality.