"The Phillips curve exists as long as governments can refrain from exploiting it". Discuss.

elaborating on this -

B. A rise in government spending represents an increase in aggregate demand, so it moves the economy along the short-run Phillips curve. The economy moves from point A to point B, with a decline in the unemployment rate and an increase in the inflation rate. The long-run Phillips curve is a vertical line that illustrates that there is no permanent trade-off between inflation and unemployment in the long run. As unemployment rates increase, inflation decreases; as unemployment rates decrease, inflation increases. The main criticism of the Philips Curve is that the negative relationship between unemployment and inflation is the short-run phenomenon. In the long-run, such a trade-off disappears, a situation where the unemployment rate moves towards the equilibrium