Keynesian economics believes all money is government money, all wealth is government wealth, so every dollar you have is not your dollar, but government dollars they allow you to keep.
Keynesian economics claims government spending has a “multiplier effect”, meaning if the government spends a dollar it is better than you spending a dollar, that government knows best how to spend the dollar. The multiplier is 1.6 times, meaning, if you spend a dollar it is only one dollar spent but if government spends a dollar it generates another 60 cents in spending.
The way you phrase it sure makes Keynesian economics seem like socialism...yet Keynes is on record of hating socialists.
Yes, it is based on some bizarre reasoning!