There's something particularly pathetic about lauding a guy for not taking a $400K yearly salary when he spends $4M a weekend on taxpayer money playing golf, but that's what you get when we've spent the better part of the past 50 years demonizing social programs and the people who have been forced to rely on them.
For a massive part, if not the majority of his voter base, they don't get to experience assets and investments that aren't their regular salary or wages and the physical items they purchase with them. They don't get high value benefits, vesting stocks, or auid pro other than bartering with their pees. From that perspective, forgoing a salary seems like a huge personal sacrifice.