Why are car hire companies demanding payments for every additional driver?

"PeterL" wrote in message
...
On Mar 25, 4:29 am, "MariuCh"
wrote:
Hi everyone,
I am from Poland.
I am going to the USA and want to hire the car for going on a tour of
states: TX, NM, AZ, UT, NV, CO.
The car will have the full cover but for one driver only (.
Why are rental companies demanding payments for the additional driver
(wife)?
During a road check/control can police demand holding such payments?

Regards,
MariuCh


From what I understand you can get a much better deal if you use a
travel agent in your home country to book your car rental.

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You can, but IME it very rarely includes free additional driver(s).