> Terminating someone when they are at the height of their productivity

Unfortunately for that rosy abstract view, 'gained significant experience' usually means 'entrenched in the party leadership and completely sold to special interests'. When votes wield less influence over a legislator than those who have bought them, they need to go and make room for someone less likely to get bought.

Let the people make examples of the most heavily bought, and there's a snowball's chance we could get back to having representatives again, instead of corporate interest peddlers.

And shorter terms, with less chance to get entrenched in influence peddling, makes that revolving door less enticing for all sides.