It has been suggested by some (including Bertrand Russell) that there is no such thing as true altruism. There is always some form of payback in the system when one does something for another person. What do y'all think?
I think there are two different questions there.
The second question is 'is there always some form of payoff'. The answer is probably yes. It's almost impossible to act within a social system without benefiting yourself in some way.
The first question is whether there is true altruism. If you define true altruism as acting with no payback, then it's almost impossible to orchestrate. You can thus claim that otherwise altruistic acts are not 'true' altruism, since they benefit the actor in some way.
However, this then sends us into different territory, since the 'true' label is not just about presence or absence of payoff, but touches on the motives of the actor. This is where the proposition looks more dubious. While acts that are devoid of payoff are hard to arrange, that doesn't in turn mean that the motive of the actor wasn't altruistic. Many of these payoffs are tiny, distant, or strictly theoretical. I've even seen it argued that heroic self-sacrifice is an instinct that benefits your genetic relations, which you are likely to have in a social group, and thus wasn't altruistic, even if in point of fact you aren't related to anyone who benefited from your actions.
In general, it's probably easier, more practical and more accurate to regard apparently altruistic actions on behalf of others as... altruistic actions on the behalf of others. We can argue about whether a social system rewards and reinforces such behaviour, or whether it would selected for at a genetic level, but by any useful measure of a person's actions, they're being altruistic.