Kibbo: Don't complicate things by explaining why two lines crossing on a piece of paper (graphed 'functionally ass-backwards' in the econ tradition!) can't make the world go around.
You'll never think you know as much about how the world works as right after econ101.
Crimson: it is more than possible to make a good living working for someone else, without being 'unionized'. However, the more replaceable you are, the less likely this is to happen. If you have unique skills, which are in demand, you are valuable, if not, you are not, regardless of whether you are 'lazy'. Union zealots sometimes forget, too, that the market power they build by regulation is innefficient and dubious. The most 'fair' relationship is between an employer who doesn't need the employee at the exclusion of all others, because another equally capable can be found for only marginally more pay (i.e. essentially the same pay), and an employee able to easily find work elsewhere (presumably at a 'marginally' lower rate).
'Supply and Demand': People are free to refuse to work for less than they feel they should ear; except that they have certain minimum commitments that must be met; if the employee has sufficient power in the labour market (ie there aren't really enough jobs to go around) the result is lower wages, so long as these wages are above what can be had from the relevent 'social safety net' if any exists, and regardless of whether the wages are adequate to support the labourer. In the medium to long term, the wages need to climb to at least a bare subsistence level if the labour force begins to die off from disease or starvation, but this is really the only stumbling block here. Note that things aren't *that bad* in North America at this time.
Supply and demand is a good way to describe the prices of luxury goods like Rolex watches, and relative prices of most consumer goods, like different kinds of food. However, when it comes to necessities, the rules become distorted; if your job search prooves futile, you will eventually take a job that under-values your skill-set, because you need to put a roof over your head. You will also pay more than you believe to be far for housing, medicine, and other goods and services that are absolutely necessary. (While someone recently described the theoretical value of 'not dying' as the discounted stream of your future production, this is not the same as the market value of that good; i.e. what you would be willing to pay. When you start analysing these things you find the best you can do is produce a 'corner solution' or rather, an indication that the solution is not described by your system of equations and assumptions).
None of this is a knock on economics, or markets, but it is a limitation; thre are some things that markets can't effectively explain or manage. Labour relations in situations where either workers or management have significant market power are on the list of things which are problematic for markets.