Why did friedrich hayek call expansionary spending dangerous?

Hayek was worried that expansionary spending would lead to poor decision-making by a misguided consumer class which in turn would lead to rapid inflation.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

i'd have to with d.

explanation: