[esrauch]

I think what you are claiming is disingenuous, if this was actually the issue then they could easily set some lower income bound on having to collect the tax (eg $10mil/year or something). It's not the mom & pop stores selling stuff online that the government is worried about; it's Amazon and other huge online retailers.

Amazon is able to handle the import duties for dozens and dozens of countries, each of which have complex rules that depend heavily on the actual product. Sales tax is strictly easier than what they are already doing, and saying that it is too complex for them to handle is simply absurd.