Its economics Aussie. Like always money is at the center of everything.
Lets say for example, the USA were to say fuck go ahead everyone build lots of nukes like we have. Then to counter that we'd have to expand our nuclear arsenals to an incredible level because you know the USA has a "thing" for having more than anyone on most everything. The defense budget which is already an abhorent and outrageous expense to US taxpayers at over $1 Billion per day would easily go into the trillions.
That would be a fiscal nightmare for the american economy.
So this is the real reason why none of the countries with nukes want anyone else to start having them too.
Da Money like always.
