There could still be an element of giving and receiving involved. For example, the man receiving the money may have been given a loan by the bank. Or he may be cashing a check given to him as a gift.
On a relationship level, a love relationship usually (hopefully) entails exchanges back and forth of emotion and affection. One could say that the love and affection doesn't really belong to one person or the other, rather they're simply exchanging it back and forth, much like the bank customer and the bank clerk. The message might be that although you receive love and affection, you aren't really being given something that the other person owns, but rather, facilitating in the exchange of something of which there is an inexhaustible supply.
Rachel Pollack has noted that in the RWS 6 of Cups, one person is taller than the other, and she takes this to suggest an implied difference in the power structure between the two, much like the RWS 6 of Pentacles. The Gay Tarot 6 of Coins might be seen the same way. Notice how the bank customer is dressed casually while the bank clerk is in a position of greater power, being dressed in a suit, part of a large institution, and the one in a position to distribute the cash.
Also, since this is, after all, the Gay Tarot, it could suggest flirting while engaged in casual non-romantic encounters such as going to the bank.
-- Lee