It is the highest impertinence and presumption, therefore, in kings and ministers to pretend to watch over the economy of private people, and to restrain their expense. They are themselves, always, and without any exception, the greatest spendthrifts in the society.
Adam Smith's 'invisible hand' is not above sudden, disturbing, movements. Since its inception, capitalism has known slumps and recessions, bubble and froth; no one has yet dis-invented the business cycle, and probably no one will; and what Schumpeter famously called the 'gales of creative destruction' still roar mightily from time to time. To lament these things is ultimately to lament the bracing blast of freedom itself.
Every individual necessarily labors to render the annual revenue of society as great as he can. He generally neither intends to promote the public interest, nor knows how much he is promoting it. He intends only his own gain, and he is, in this, as in many other cases, led by an invisible hand to promote an end which was not part of his intention.
People of the same trade seldom meet together, even for merriment and diversion, but the conversation ends in a conspiracy against the public, or in some contrivance to raise prices.
By pursuing his own interest (the individual) frequently promotes that of the society more effectually than when he really intends to promote it. I have never known much good done by those who affected to trade for the public good.