You're wrong. The USPTO has an obligation to review any prior art that raises a substantial new question of patentability, even if the patent has already issued. Post-issuance, any person can request ex parte re-examination (even anonymously), and the cost is $2,520. That's a couple orders of magnitude cheaper than you asserted, so in the future, please refrain from commenting on matters about which you know nothing.

Indeed. The inefficiencies are indecent enough to make an economist blush.