Postnord's argument that the handling of parcels from China took too much time was utterly nonsensical, especially given in the light of their usual complaints about the fact that fewer people were mailing stuff so they had to raise prices. If handling parcels from China took too much time they simply had not been very good in negotiating a deal with China Post about parcel rates.
Another factor in the nonsensicality of this tariff is that Sweden is more or less the only country which starts charging sales tax (called moms here, comparable with VAT in the UK, BTW in the Netherlands etc.) from a value of 0kr (i.e. free, but sales tax is paid on the shipping costs). Where other European countries start charging sales tax when the value of imported goods rises above (e.g.) €20, Sweden starts at €0. Many parcels ordered from China fall under that rate which make it a very common thing to be represented with the following:
price of ordered goods including shipping: €4
sales tax: €1
"handling fee": €8
total: €13, of which €9 goes to the Swedish state (directly or through Postnord)
Mind, this is not the shipping fee as that was already paid for in the €4 purchase price. If the same parcel were ordered to the Netherlands the customer would pay €4 and that's it, no import fees and no tariffs.
The so-called "handling fee" is nothing but an excuse to put a tariff on international trade for individuals, a way to make sure the fruits of globalisation stay out of reach of the public.