What factors can lead to the development of mixed economie?

An example is a situation called stagflation? This will answer your question if I understand your question right. Stagflation is when the economy is appears to be red hot, but in actuality it is just a mirage. The income levels have stop increasing, the cost of living is going up. Basically, everyone is getting poorer but the public doesn't realize what is happening. Inflation is a way to remove debt from the corps and government and then assets or wealth from the public