There’s no way in he*l any government would let an almost free energy source to be developed - or anything else that would interfere with the deep pockets of the big boys. Just think “Tucker Torpedo” for one of example.
Best damn car to come down the pike at that time = and would’ve mopped the floor with the big 5 in Detroit. Their bought and paid for buddies in DC squashed Tucker like a bug - and then the big 5 proceeded to steal his innovations - many of which are still in use today/
Or if they let it be developed they make sure the Big Boys are in control and the cost of the technology is set high enough so that it doesn't upset the other Big Boys. Example: nuclear power generation, GE, Westinghouse and oil corporations. Nuclear power was touted at first as practically free energy but before it rolled out it was over-regulated and government controlled to such an extent that only a select few companies could build it and its power generating costs were as expensive as oil.