The disappearance of the middle class is not some "master plan" of billionaire bankers who have all benefited hugely from President Trumps tax cuts, but is simply the outcome of the normal processes of capitalism.
This transition from a large middle class to the rich getting richer and the poor becoming poorer has been occurring for decades under successive governments who have been focussed on supporting the political donating elites such as industry leaders, politicians and Hollywood icons, rather than serious structural reforms.
Trump has at least attempted to bring to correct the Chinese trade imbalance, increase domestic production and employment and to a large degree succeeded prior to the invasion of the CCP instigated virus.
