It's an excuse to award state contracts, which are massively profitable for the bureaucrats awarding them, and for the winning bidder selected (who has business connections with the bureaucrat.) Half of these companies that completely fail at not overrunning their budgets by 2-5x don't even exist before these contracts are awarded, and don't exist for long afterwards. The rest are deeply entrenched in government.

It's only negative ROI for the taxpayer. The Olympics and the World Cup are just excuses for graft.