You are right when you say the economics is deeply corrupted by politics. At least mainstrean economics.
The problem is one of propaganda first and foremost: the only thing that is widely thaught in universities and that we keep hearing all the times is Keynes.
The problem is: Keynesianism is totally unable to predict anything further than two or three years. It also inevitably leads to the country defaulting. There's no other way. There never has been any other way for a country run under the Keynesian dogma.
I'll give an example: before the first euro even circulated there have been economists (of course non-Keynesian ones) who predicted the very exact scenario that happened to the eurozone 13 years later. Too many houses in Spain, too many industries in Germany, too many public servants in France and as well the default of Greece and Spain (Greece is going to default again btw and Spain is going to eventually default too).
These were quite impressive "predictions" for some. For others it was simply about applying what Friedman has been telling since forever.
That's the problem: Keynesianism can only predict up to two or three years in advance and that at the cost of sinking the country.
But Keynesianism is precisely what politicians wants to hear: they take it as a free ticket allowing them to create an always bigger public sector (and hence they can feel always more and more "important").
The result? Deeply corrupted economists that happily sing the only song that politicians want to hear.
The non-Keynesian economists who precisely predicted the mess we're in today? Nobody is listening to them (well I am for my positions, because it nets me a lot of money but not a single politican want to listen to them).
This is really a sad state of affair and it shall stay like that as long as the fraud that Keynesianism is is going to be taught in universities as if it was the holy gospel.
Note that the disciples of Friedman who predicted Spain and Greece's defaults did not just say: "Spain and Greece are eventually going to default". They did predict precisely the mechanism, over a decade and a half, that would lead to the defaults. They were already right for Greece and the future is going to prove them correct again.
Note that since then they've explained why there's no way on earth Greece is ever going to repay its debt and that inevitably Greece would default again.
While the Keynesians are all wrong and keep telling us that more public debt is going to solve all the eurozone issues.
The problem is that once countries reach about 100% of public debt (which they inevitably do when run under the Keynesian dogma), there's simply no way out using Keynesian tactics.
So, yup, to me Keynesianism is an utter failure and it's going to get uglier and uglier.
You don't want to be jobless in Greece today.
The fact is: Friedman disciples predicted precisely that in 1999. Keynesians didn't.