How about taxation as it is (ok, maybe simplified a bit as Paul says) .... and then a few percent on top that would be discretionary within one of a number of categories (NHS Defence, Education, Homelessness etc) .... for those less keen to shell out more in tax, that approach might make them less resistant ... and with it being a 'top-up' to the existing taxation you wouldn't get nothing spent on necessary, but unpopular, areas. With the proviso that a bumper take for, say, education couldn't trigger a reallocation of existing budgets.
Might make things more palatable for the less civic minded 'well-off' to feel somewhat in control Of where their extra taxation went
K
