I personally marvel at what an upstanding and civil government we have, but then again my family is from Bangladesh and we left because my dad was sick of having to do things like pay a bribe to get a phone line installed (we went months without phone service in our house because of his intransigence).
Living in New Mexico can be a bit of an absurd illustration that this isn't a universal view because we tend to have scandals involving these ancient political family dynasties. Whenever one of them is caught handing over a bunch of state contracts to their nephew (nepotism in its truest sense) we get a few great sound bites like "What's the big deal? He's just my nephew!"
In other countries this kind of corruption is seen as simply taking care of one's own or the cost of doing business. I'm glad we overreact to it.
In some cases we might wonder if we are viewing sheer incompetence or wanton political corruption, but just as the end results are the same in either case, so are the perceptions.
Australia has a strong two-party system and we're ranked seventh. New Zealand has an essentially two party system and they're ranked first.
Things like that.
Or what it takes to get a zoning variant - if you know the mayor you are probably more likely to get the variant.
So instances like you suggest or; local businessman gets caught 15 times for DUI and never charged because he funded the mayors election campaign. (this happened in my area, he finally got charged after the federal government here in Canada blocked the Carter defence) Whether or not the mayor played any role its the whole guilt by association.
I personally wonder why Canada ranks so low in comparison to the US and UK when we have moronic "canada first" laws in industry that protects monopolies, but then again this is "perceived" corruption and the layperson won't be as likely to perceive vastly overpaying for a service as corruption.