Marc, could we maybe do away with every other word bolded? Makes it hard to read. It's like speed bumps.
Far as I know "Liberal" and "Conservative" are political terms. There may be cops, nurses, plumbers, whatever, who lean to one or the other but it doesn't follow that that they are therefore more or less prone to abuse power within their professions. A legislator leaning Liberal or Conservative is exercising one kind of power, a cop is exercising quite another.
Cops in general may lean right, way right, and may also abuse and grossly abuse their power. I don't see them as related. Cops abuse their power not as a result of being conservative but because they're immersed in Cop Culture, which holds a highly socially stratified outlook (and that is certainly a conservative, and militaristic, outlook). So in a roundabout way maybe there's an indirect association.
I suppose your point here is akin to what I often say, that you don't have to be racist to be a conservative, but you do have to be a conservative to be a racist, because of that same outlook of social stratification?
Anyway, as I said at the beginning, if I had to choose I'd say a Conservative is more likely to abuse power, given the choice between the two, simply because abuse of power is anathema to Liberalism.