There is a whole branch of econometrics that has endless methods of doing macroeconomic quantitative analysis using data. It just doesn't work on the macro level, the data is too aggregated, the system is too entangled with dependencies between collected data and incomparable between countries, results have only historic and not predictive value and even then they are usually more voodoo than anything else.

So I disagree: Macro economics needs less computation, data and abstract mathematical models.

The Hayek quote that CaseySoftware wrote into another toplevel comment sums it up perfectly: Only pretense of knowledge coming from this.