It is a good idea to blame scheme collapse on the opposition. Make the fight with the opposition a good show. They blame you for monopolizing everything under the sun, you blame them for blocking important coercive papers that would help to bring about peace and prosperity for the less privileged, but in fact you take money from the middle class at gunpoint, take jobs from the poor and pumps the money into lobby groups like the military industrial complex, the environmental movement or the health care industry.

Normally you can share power going back and forth every 4 or 8 years, but it gets tricky at the end. As each party can see the money run out and the bloated bureaucracy falter, they grab as much as they can, leaving nothing for the next one in power. Things go exponentially fast at the end.

Still it is very useful for both parties to swap power, as it obscures that the principle of politics itself causes them to get into ever more hardship. You can grab more power faster than would have been the case without an opposition party, since it would have been more obvious you were responsible for what was happening. First and foremost you obviously blame the free market, but the opposition is a good second.