well it's more that people don't question. if the king says off with your head, then it must be good since the order came from the king...
I try explaining "african" politics to non-africans and it's a bit impossible. You need to have lived here to understand, sort of. I'll try a bit quickly: Let's say for example the party A won the election with 45% of the vote, party B got 35% and C the rest. Straight after the election victory the population will simply accept everything that party A does, because they were the victors.
The concept that you can question and challenge the victor is foreign to these people. The next time there is an election, people will vote for party A, simply because party A are the rulers and have said that you must vote for them.
Of course in the case of Swaziland it is a Monarchy with the "parliament" doing whatever the king wants them to do, so there isn't really a democracy at all. You can vote for someone but he will just end up doing whatever the king wants...