The mainstream Standard Model of economics generally replies to calls like yours with: 1. Investment income has already been taxed once labour income, it isn't

The mainstream Standard Model of economics generally replies to calls like yours with: 1. Investment income has already been taxed once labour income, it isn't "fair" to tax it "again". 2. Property value taxes drive out elderly on fixed income. Soros' promotion of economic reflexivity broadly addresses these responses. As a practical matter however, capital behind investment income (including property interests) has generally captured sufficiently large sections of political, legislative and regulatory infrastructures that you could theoretically muster enough votes to get taxes ostensibly "raised", yet still get defeated in detail when it gets down to brass tacks implementation in those areas. The way it works is if the political races cannot be tilted in favor of sufficient numbers of legislators to dilute/destroy the implementation of the vote through successive election cycles, then pressure through lobbying will attempt to sway legislative processes (from standard lobbying tactics to clamoring for parliamentary manoeuvres, etc.), and if the changes get through that, then regulatory capture will work on diluting/nullifying enforcement. It's not hopeless; go into it with eyes wide open.