Mandatory sentences always bring out strong emotions.
Caj has rightly pointed out some of the problems he's seen in Louisiana.
Florida has taken a slightly different approach. Some is good, some is not.
Firstly, we have the 10-20-Life sentences for use of a firearm in a crime. Not all crimes, but most felonies, fit into that. Carry a firearm at, say, your robbery-10 years day for day. Fire the firearm at your robbery, don't hit anyone-20 years, day for day. Seriously injure or kill someone at your robbery with your firearm-25 years to Life, day for day (means no good time, you do every single day).
A couple of "lesser crimes" have only a 3 year day for day mandatory if you carry a firearm.
That's good.
And, we have really draconian sentences for repeat offenders. Commit certain felonies within three years of release from prison, or commit certain felonies after being convicted of other felonies before this crime-big sentences, like an armed robbery gets Life.
That's good.
And we did away with Parole and, in 1995 we voted in a Constitutional Amendment that requires one to do at least 80% of any prison sentence. Never less, and if one acts up in prison, one can do more.
That's good.
The bad-we felonized almost everything. It's hard to find a misdemeanor to charge someone with when it's the right thing to do. Example: a young, single mom is arrested for living with her kids in a filthy house. It's a felony and, while there are some moms who should be charged for that, sometimes it's a matter of stupidity or ignorance and might be better handled with a misdemeanor and probation, especially if Mom has no prior record.
There's no misdemeanor that fits, so it forces the prosecutor to become a defacto probation officer. He agrees, for example, to hold off filing felony charges if Mom takes parenting classes and then stays crime free in a relatively clean home and otherwise cares for the kids. If she does that, he then files no charges. Problem is, that leaves a case lingering for six or so months till he's relatively sure (based on social workers reports) that Mom is on the right track. In the meantime, Mom is still considered to be charged with a felony, has trouble with employment and doesn't have anyone really supervising her as there would be if there was a misdemeanor probation officer involved.
Some prosecutors don't want to be bothered with this (and it is a bother considering the case load they have) so they simply charge Mom and let the courts try to deal with it.
I am happy to have retired and now all I have to do is listen to my friend's good and bad stories about justice in Paradise.
They have to listen to my stories of how well I did or didn't do at the last Trap Shoot.
Bob