scammers must think we have crap for brain

I was a little bored so I went to check my spam mail box. Ok, the truth is I didn't get any email so I checked my spam mail, what's so bad about that?
Anyway, I found this ridiculous spam.

Dear Friend,
I know that this mail will come to you as a surprise but honestly I do not
intend to surprise you. In introduction my name is Richard Uduku I write this
letter in respect of my intention to transfer and invest the sum
of US$18,000,000.00 in your company which I inherited from my Father who was a Politician and oil/Gold dealer from Guinea Bissau .But unfortunately he was shot
dead by his political opponent during one of his business trip to Cote D Ivoire.
I am now left with my only surviving mother who unfortunately has been
critically ill since 2 months after the death of my father because of the shock
of his late husband's death. And because of how my dad's political opponents has
been trying to eliminate our entire family, I then had to run out of my country
with my mum for our dear lives.
The fund in question is now with the Financial Firm where it was deposited
and all it's Documents are still intact with me. In view of this plight, I
expect you to be trust worthy and kind enough to assist me ,I hereby agree to
compensate your sincere and candideffort in this regard with 20% of the total
fund and 5% for expenses,which may arise during the transaction.
Whatever your decision is please contact me immediately through this email richard_uduku@she.com
Best Regards.
Richard U.F

This is good enough material for a soap opera. What's with politician dad got axed by political opponent and a mother who's critically ill. And they have 18 millions bucks which they can't access and have to ask for MY help! The whole spam just yells SCAM at you, doesn't it? Even my webmail client has enough sense to put this in the spam box.
These scammers must be either really dumb to come up with this scenario or they think that we have crap for brain.