As the percentage of GDP represented by government spending increases growth in GDP for all decreases. Really, if government were the source of prosperity it would have no need to tax. The result is that the more government there is the higher the percentage of the economy that is non-prosperous.
It should be no surprise that Europe's growth is perennially dismal.
Data Source for the two charts below:
(All available data was used. No cherry picking.)
(Each Data Point Represents a Nation)