Just as the business cycle seems to punctuate times of economic growth with periods of stagnation or recession, so there appears to be a political cycle in democratic countries, a cycle that features times of economic consolidation and progress with those of profligacy, deficit and debt.
In some countries a centre right government coming into office institutes policies that rein in spending and encourage the growth of the private economy. Supply side policies aid business development and expansion, and tax cuts increase rewards and act as incentives to economic expansion.
The growth that often follows the policies can lead to the re-election of the government that implemented them. The feel-good factor of improving standards, higher wages and inflation under control can enable such a government to secure re-election.
Memories are short, however, in the democratic cycle, just as they are in the business cycle. People come to take wealth and growth for granted, and to be less prepared to continue with the policies that led to them. People grow careless and are more ready to take political risks.
Quite often a party that proposes to concentrate on distributing the new-found wealth rather than on continuing to grow it, appeals to the electorate more than the one whose policies helped bring it about.
The centre-right government is replaced by one that leans more to the left. It sets about expanding benefits and growing the public sector. It tries to exact more from private business by increasing taxes. It needs to fund new programmes and borrows money in order to do so. For a time its largesse is appreciated, but increasingly investment and business find it harder to flourish in the new environment it has created.
Growth slows down, the economy grows sluggish. People begin to feel less secure and less wealthy. They begin to question the competence of ministers who seem unable to manage the economy. The left-leaning government sometimes wins its first re-election after a term in office, but often with less enthusiasm than that which first put it there.
The economy stagnates under the impact of inappropriate policies, and a centre-right government is sometimes then elected to clear up the mess. It implements the policies that encourage investment, applies fiscal responsibility, and makes it easier and less costly for firms to take on new employees. Gradually the economy recovers, and the democratic cycle begins once again.
It might be a feature of democratic societies that whenever wealth and growth are created, a popular party will eventually secure election on the basis of promises to redistribute that wealth. The less well-off can always outvote the more well-off. It means that instead of a steady continuation of policies that allow the economy to grow, there is more likely to be a staccato, with periods that help the economy alternating with those that stunt it. This is more about politics than it is about economics.