Army Judge, thanks for your reply,
I understand the premise behind how they are they are "included" what I don't understand is how they can have crimes that are significantly different in severity but still carry the same sentence guidelines.
It doesn't seem just or fair to me that a defendant can be tried on relatively benign charges(petty theft) when the crime being alleged(armed robbery) is much more severe in nature.
To me, it allows a prosecutor or judge to dole out a sentence that is more suitable for the greater offense, when the lesser is the one they tried him on.
I get it, now, Sisyphus.
You're applying logic, reason, and scientific analysis to an illogical, unreasonable, and unscientific subject, the law.
Law is a social science, often created to protect those with money, influence, and power.
When kings ascended to the the throne by birthright, the king ruled that he couldn't be sued.
As the fiction of freedom developed, and kings ascended to power by elections, laws softened somewhat, but those who make laws for us peasants; often exempted themselves from obeying those laws.
We need only look at the recent hubbub about health care to see where Congress exempted themselves from the law's impact.
I'm sure you've seen where those convicted of crack cocaine abuse or sales, were sentenced more severely than those convicted of powder cocaine abuse or sales. The former tending to be those of color, the latter being more represented as those not of color. That discrepancy was argued for years, until Obama and Congress finally adjusted the federal sentencing guidelines to make the more congruent.
We can look at a certain crime being a misdemeanor in one state, a felony in a neighboring state, and legal in another.
I think you're mixing apples with potatoes when you say petty theft is a lesser or included of armed robbery. A weapon used in the commission of a theft raises that crime from robbery or larceny to armed robbery. Simply put, petty larceny isn't a lesser or included of armed robbery. I get your point, but you need to keep the crime chain in the lane.
Robbery for example, using a gun, (or making the victim THINK you have a gun) makes it armed robbery, even though the perp had no weapon.
This is a good discussion of aggravated (armed) robbery in Texas.
http://statelaws.findlaw.com/texas-law/texas-robbery-laws.html
You can compare and contrast NY state's interpretation of armed robbery.
http://criminal.findlaw.com/criminal-charges/robbery-penalties-and-sentencing.html