If the profit rate in the private sector goes down too much, in the end the public sector can't be financed (you can borrow and pay government workers for a while). At bottom, the public sector is more dependent on the private sector than the latter on the former, economically.
To the extent that capitalists succeed in decreasing taxes on them and increasing taxes on workers, as US capitalists have, it becomes politically difficult, too, to create support for public sector workers among private sector workers, especially if private-sector workers are much less organized than public-sector workers, as in the case with the USA.
Yoshie Furuhashi <http://montages.blogspot.com> <http://monthlyreview.org> <http://mrzine.org>