It will force corporations to pay their workers more because there's finally another option for workers to make more.

This will have the biggest impact in developing countries, where workers can work on any decentralized project without needing to arrange Visa sponsorship to a developed country.
Since decentralized development work can be done from anywhere (by anyone with enough skill), it will be outpace other options in developing countries long before it will challenge the status quo in developed countries (although realistically that will challenge the status quo early because most companies above a certain size have both 'onshore' and 'offshore' development teams).

Corporations that perceive particular value in having on-site workforce (like the googleplex) will continue to pay a premium for bringing their workers on-site, and it will take longer before the rewards available for decentralized development are sufficient to challenge them.

There will of course be exceptions to this... on DAO's like Hive, proposals are much more likely to be approved for whales than for non-whale developers in developing countries, even when those whales are asking for U.S. equivalent payment levels. In effect, part of their DAO-paid value capture is an unseen reward on their stake, not just payment for the work they're doing.
While it may be possible for non-whale developers to get onto those teams, their work is much more likely to be paid through traditional contract-arrangements, not paid directly through the DAO.