Result in only well-funded scientists being able to publish their work.
The ability to publish in scientific journals should be available equally to all.
Reduce the ability of journals to fund peer review.
Most journals spend 40 percent or more of their revenue on quality control through the peer review system; without subscription income and with limitations on author fees, peer review would suffer.
Harm those scientific societies that rely on income from journals to fund the professional development of scientists.
Revenues from scholarly publications fund research, fellowships to junior scientists, continuing education, and mentoring programs to increase the number of women and under-represented groups in science, among many other activities.
Members of the DC Principles Coalition have long supported responsible free access to science and have made:

selected important studies immediately available online, in their entirety and at no charge

studies available at no cost to patients who request them

all abstracts immediately available online at no charge

full text of the journal available at no charge to everyone worldwide within months of publication, depending on each publisher's business and publishing requirements

all journal content available free to scientists working in many low-income nations

articles available free of charge online through reference linking between journals

content available for indexing by major search engines so that readers worldwide can easily locate information
"By establishing government repositories for federally funded research, taxpayers would be paying for systems that duplicate the online archives already maintained by independent publishers," Case noted. "The implications of the U.S. government becoming the world's largest publisher of scientific articles have not been addressed," she added.
According to Frank, "As not-for-profit publishers, we believe that a free society allows for the co-existence of many publishing models, and we will continue to work closely with our publishing colleagues to set high standards for the scholarly publishing enterprise."
The
DC Principles for Free Access to Science Coalition represents more than 75 of America's leading nonprofit medical and scientific societies and publishers. The not-for-profit publishers are committed to working in partnership with scholarly communities such as libraries to ensure that these communities are sustained, science is advanced, research meets the highest standards, and patient care is enhanced with accurate and timely information.
HighWire Press, a division of the Stanford University Libraries, HighWire Press hosts the largest repository of high impact, peer-reviewed content, with 1,014 journals and 4,109,139 full text articles from over 130 scholarly publishers. HighWire-hosted publishers have collectively made 1,590,623 articles free. With its partner publishers HighWire produces 71 of the 200 most-frequently-cited journals.