Tax on gasoline is a direct tax on the poor. Its the reason its not raised, it would most affect the cohort that are the ones that care about minimum wage.Federal gas tax hasn't risen in actual cents since 1994. It's a bigger political third rail than social security.
Roads are still built - its paid from the general fund, which is mostly funded by income tax, which is mostly paid for by the upper income earners.
Raising gas taxes wouldn't bother me one iota.