I definitely only meant it for the TSA, and I'm glad you pointed this out. However, I suspect that in these countries that have the financial constraints you d

I definitely only meant it for the TSA, and I'm glad you pointed this out. However, I suspect that in these countries that have the financial constraints you describe, opting out may not always lead to decommissioning them because installing alternatives requires significant expenditure (which is why the US could afford to get rid of them in the first place). I don't think this is universally true (i.e. I expect some countries ended up with old backscatter scanners but would choose to replace them if many people opt out) but I don't know that this intersection is very large.