Keynes was dead before the welfare state was invented there was very little support for the population in general.
What absolute nonsense David. Do you actually have any knowledge at all of Keynes and the Welfare state?
Fact no.1.
The Beveridge Report, which was a result of many decades of concerns about the social welfare of the UK population expressed and studied by a wide body of people, was published in 1942. Keynes died in 1946 and was working very nearly until he died.
Fact no.2.
Keynes was very much involved in working on economics of Beveridge's plans
"Keynes became involved during 1942. Beveridge sent him memoranda setting out his emerging proposals, and Keynes subsequently became one of the important people scrutinising the plan from the Treasury/economic perspective. Cambridge's edition of Keynes's collected writings describes his involvement in considerable detail."
The above from AI.
I checked out the link given. It leads to a Cambridge University edition of Keynes' collected writings (he was a Cambridge professor, of course) in which Chapter4 covers his involvement with the Beveridge Report.
www.cambridge.org/core/books/abs/collected-writings-of-john-maynard-keynes/beveridge-report/9073BC40D7985E8770B048C0C32BDCB1
His theories were for governments to create investment for productivity not to improve comfort of citizens.
Keynes' was indeed very much concerned with productivity , but it was in the context of full employment and he recognised that to achieve full employment and increased productivity needed attention to the health and welfare of the citizens who worked to achieve it. Not only that, but he believed that citizens should have a full and good life outside of 'work' to enable them to enjoy the benefits of their productivity. Social welfare was an important contribution to this. So he was very much concerned about the comfort of citizens.
In the 1930s he wrote an essay 'Economic Possibilities for our
Grandchildren' in which he, rather optimistically, predicted that technological improvements, leading to increased productivity would, within a 100 years:
...for the first time since his creation man will be faced with his real, his permanent problem-how to use his freedom from pressing economic cares, how to occupy the leisure, which science and compound interest will have won for him, to live wisely and agreeably and well.
The strenuous purposeful money-makers may carry all of us along with them into the lap of economic abundance. But it will be those peoples, who can keep alive, and cultivate into a fuller perfection, the art of life itself and do not sell themselves for the means of life, who will be able to enjoy the abundance when it comes.
He also, in this essay, expressed his belief, which is very relevant to this current discussion, that:
^...*The love of money as a possession -as distinguished from the love of money as a means to the enjoyments and realities of life -will be recognised for what it is, a somewhat disgusting morbidity, one of those semicriminal, semi-pathological
propensities which one hands over with a shudder to the specialists in mental disease.* All kinds of social customs and economic practices, affecting the distribution of wealth and of economic rewards and penalties, which we now maintain at all costs, however distasteful and unjust they may be in themselves, because they are tremendously useful in promoting the accumulation of capital, we shall then be free, at last, to discard.^
www.econ.yale.edu/smith/econ116a/keynes1.pdf