First of all, being settled in Germany, everything we offer on Kickstarter is subject to German VAT at a rate of 19%. This is not to be confused with the Import VAT that all EU-friendly projects pay (including ours) instead of the backers individually. As a German company, we have to add 19% taxes to any reward offer, even shipping fees. That turns our product price of 63 € into 75 € and shipping fees of 9,24 € to 11 €, as an example.
The other reason is that we're neither a big publisher, nor do we use Kickstarter to market a product that is already financed otherwise. Many game developers and publishers do this to promote their products, but they already have an initial edition of several thousand pieces secured (e.g. for retail), which results in very low manufacturing costs. Being a startup, we use Kickstarter in its original context: To completely finance this project and thus, make it possible. Compared to publisher projects with big editions, that makes a huge price difference in production. If you compare a 3000 pieces edition to a 1000 pieces edition, the latter can be twice as expensive in manufacturing costs per piece, especially when you have custom plastics.
Last but not least, we decided to add in the shipping costs right from the start to be completely transparent about the costs involved. With an oversize, 3kg game, the shipping costs alone make ~20% of the funding goal.