He was fascist economically which is just a branch of socialism.

He had socialist ideals just that the socializing of the means of production were to serve the state, not the proletariat like original Soviet style socialism. The state was also the 'master race' ideal.

Hitler viewed that he could buy power through regulations. The business leaders would be forced to follow his command otherwise he would branch off and actually nationalize the means of production if they didn't submit. His core ideal was that businesses should be owned by the state or regulated so hard that they basically are run by the state, and of course in both scenarios they must serve the state.