This is just the official airport tax that is normally included in your airline ticket price for most other airports/countries. It's cash only, and they'll gladly accept major foreign currencies at greatly inflated rates if you're caught unaware: https://www.clark-airport.com/

Same with the below, which is showing up in Western Australia for some reason:

http://dbpedia.org/page/Shell_House_massacre

For the first year, you're tied to your employer. After that, you're free to change jobs, but only within your field of work.

You need to reapply for the work permit when you change jobs or every two years (max validity duration), which is quite painless. After 4 years you should get permanent residence, and no longer need any permits.. This is the process for most non-EU residents.

Is the permanent residence just granted after 4 years, or is it a stressful process like the American Green Card one?

It's (for now, anyway) a fairly routine process. If you've been a legal, self-sufficient resident of Sweden for 4 years, you get permanent residency after a straightforward application.

There is some debate over adding a Swedish-language requirement, but there isn't currently one. That is one of the two difference with Denmark: if you're a non-EU immigrant to Denmark, you need to live there 5 years under the same conditions rather than 4, plus pass a middle-level Danish competency exam.

Interesting. And once a permanent resident, do you know how hard it is to attain citizenship?