Well you have to start with the basic premise that government policies influence human behaviour, and therefore that higher tax rates on individuals (and businesses) do not automatically result in higher revenues for the government. Indeed, history shows that high marginal tax rates on those in the highest earning bracket produces less revenue from said earners for the government. At a certain point, high tax rates on those with high incomes simply led to those incomes being invested in various tax-free schemes, with the revenue from them being completely lost to the government, and the investments lost to the economy.
It all depends on what the rate actually is in other words. The question that should be asked is whether people really prefer the symbolism of higher tax rates, or the substance of higher tax revenue?
All in all, I'd just prefer it if people were much more aware of facts. Then the rhetoric from either side wouldn't hold as much sway.