Why do they hand down ridiculous life sentences such as 120 years, if it's impossible for the person to serve the entire duration?

Why do they hand down ridiculous life sentences such as 120 years, if its impossible for the person to serve the entire duration?
Two answers. The first and foremost, it is a statement of how severe the crime was
Richard Reid, aka the shoebomber

In 2002, Richard Reid, a British convert to Islam, tried to bring a plane down in the middle of the Atlantic with a bomb hidden in a shoe. He was stopped by his fellow passengers and handed down:

three consecutive life sentences
110 years in prison on top of that, with no parole, to be served consecutively after all the life sentences
supervised release of five years after he did that time, because the law required it
a $2 million fine
Richard Reid did not have $2 million to pay, nor did he have the ability to come back to life multiple times, to serve his three consecutive life sentences plus 110 years without parole. For the purpose of keeping him away from anything dangerous a single life sentence would be eqully good, but handing down three of those, plus over a century without parole, plus stripping him of everything he ever owned to pay perhaps 1% of his fine, sent a far more powerful message.

The other reason is that with these sentences, there is no way any lawyer could negotiate a parole of some sort. Even if he managed to get through three consecutive life sentences somehow, he’d still be left with another 110 years in prison of which Richard Reid served none, because that’s how his punishment was worded. He’s in for life and if he manages to get around that somehow he’s still in, safely locked away from the outside world.
Why do they hand down ridiculous life sentences such as 120 years, if it's impossible for the person to serve the entire duration?
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