They know, and have been doing it since FDR where even he threatened to #DemExit if the DNC continued to be Republican-Lite. Despite that, people like you continue to have romanticized impressions of governing elites much like pro wrestling marks ...
Because you never think this through do you? For new employees their compensation is both pay AND training/skills building - so instead of PAYING for that education/training you are PAID to learn - all that free education goes away if $15 min wage succeeds
They know. cambridge.org/core/journals/…
" . . economic elites and organized groups representing business interests have substantial independent impacts on U.S. government policy, while average citizens and mass-based interest groups have little or no independent influence."
They don't care. There is no Democratic party. There is no Republican party. There is a radical corporatist party with a red team and a blue team. These teams play soap opera politics with lots of good guy/bad guy drama. They have one goal; serve the 1%.