The Scotsman, so pro-SNP that its Associate Editor is the SNP PPC for Edinburgh East, has today published a list of reasons why their local income tax should be dropped:

It's unworkable

Council tax is ridiculosuly unfair. It is an anomaly in a progressive taxation system, because it fixes the amount that can be paid at the top. The poorest pay more as a percentage of income in council tax than rich people do.