What is the Best Cash Back Retirement Credit Card

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I travel extensively for a living and most of it is international travel and I get reimbursed for all of the expenses so I am looking for a retirement focused cash back credit card...AND...it needs to have no foreign funds transaction fees.

I know that I do not want a card that offers "points" or some other gimmick...I just want the money that will be placed into my retirement account automatically each statement.

Is there such a credit card?

If so just tell me what to do and I will do it!!!

THANKS!!!