The main point of public choice economics seems to be that people go into politics often for the same reason why they become doctors, accountants, or hit men: in order to profit or make money, and because they enjoy some advantage in these lines of work.
In principle, politics is a battle of ideas: people spar with each other with arguments of how best to promote justice and common good (defined by Jason Brennan as “a combination of institutions — such as social order, shared ethical/social norms, rule of law, and markets — that are indeed to everyone’s advantage” (89)). “Politics is fundamentally cooperative, not competitive,” says Schlueter (100).
But politics is easily corrupted from a debate on how to promote the general public interest to a battle of factions and pressure groups to promote their own particular private interests precisely at the expense of the common good.
Politics “without romance” is simply loot and privilege seeking; what’s more, this type of politics is far more lucrative than honest concern with general welfare.
It is my contention as a libertarian that 99% of politics on the federal level is in this sense corrupt.