Unfortunately, even these platform statements aren't complete. For example, let's take one of my least favorite senators, Ron Wyden of Oregon. Here's what his platform site says about taxation:
economic-opportunity-for-all
Wyden is a long-time proponent of wealth taxes. Are they mentioned on the platform, no, but he is, such as mark to market:
wyden-unveils-proposal-to-fix-broken-tax-code-equalize-treatment-of-wages-and-wealth-protect-social-security-
Wyden is actually not what his web site implies he is: a for the people moderate. Anyone who thinks these new proposals are just for the ultra-wealthy few, needs to read the history of the Alternative Minimum Tax system:
what-amt
Originally aimed at 155 individuals, at its peak AMT ensnared over five million tax returns, so perhaps nearly ten million taxpayers. Counting dependents, that means AMT affected probably one in twenty people in the US. IMO, anyone who thinks these tax-the-wealthy schemes stay narrowly focused on the wealthy is naive.