Newspapers and horseshoe manufacturers need government subsidies now! (according to Keynesian economists) ;-)
I don’t think Keynes would have supported government subsidies for specific dying industries. Remember, he wrote
The General Theory of Employment, Interest, and Money was published in 1936, and written at a time when the great depression was still on. There was a famous exchanges of letters between Keynes and Hayek in which Keynes indicated that he supported many of Hayek’s positions.
Do not confuse Keynes (who died in 1946) with left-wing “Keynesians.”