The welfare state policies you cite were created in 1911 and found to be inadequate to deal with the market crash of '29. They were replaced by new welfare policies in 1931.
Britain was already suffering from a depression that began in 1918 and was exacerbated by the market crash of '29, they didn't recover until the nation was placed on a war footing. The impact of the great depression was only blunted because they were already in a recession, not because they had social safety nets.
It was the Treaty of Versailles that crippled Germany after WWI, not the welfare state.
The NSDAP was promising to disregard the Treaty of Versailles, to repatriate lost land for the Reich, and ignore the financial obligations of reparations. They also promised to continue, and expand, the cradle to grave welfare state, a task that could only be accomplished if the German people were able to get out of their treaty obligations.
That's precisely what I said earlier. That money was supposed to be backed by gold but the Federal Reserve printed money in such quantities that the gold reserves were inadequate to cover the notes. It was the crash that popped the Fed's bubble and set off the run on the banks, causing many of them to collapse, and resulted in the US abandoning the gold standard in favor of fiat currency.
