Nice try. Organization plans to fund A & B ($10 each). I restrict my $10 gift to funding A. That frees up others' contributions (totalling $10) to fund B. Organization then spends others' $10 contributions on B. Without my contibution for A, there's less in the pot for all (Only $10 total). Organization would have to limit A & B to $5 each, or might have to choose between funding A or B. Perfectly fungible money solves the problem.
Right. Like any government money that goes to Planned Parenthood to maintain heath services is money that it freed to maintain abortion services.
Exactly.
The United Way they came up with the idea of "directed" donations. BUT, for every dollar you gave a specific charity, the United Way reduced their allocation from the "general fund". The additional money now in the general fund then got reallocated across the board.
Organizations towards which you did not want to contribute (in my case, Planned Parenthood) essentially got some of your money.