Is it even likely that the US will have any money to spend on such research in the next 20 years?
fed "loans/prints" at least 80-100 Billion$ US/Banks every month... 20 years from now no they wont (inflation + economic crash) ...but right now one can make the arguement that money is free/unlimited to to semi-secretly have huge operational budget for the attempt to build an efficient quantum computer (remember the atom bomb project? they had a whole town of scientists/w.e all working on building it) think about it..
can I say that the concern and wish to have more discussion about this topic now is understandable?
...instead of what i see a lot of: people dismissing it as "oh well its like 20 years in the future no worries, not a threat"