Cabinet Office Minister Francis Maude said fewer than 20% of civil servants were on strike today compared with a third in the last big walkout in 2011.
Mr Maude said today's disruption was the fault of union leaders and urged public sector workers that the right to strike must be exercised "responsibly".
He pointed out that only one in five members of Unite and Unison had taken part in ballots leading to the strike, adding that low turnouts strengthened the case for reform.
Union leaders said they were "overwhelmed" by support after a strike by public sector workers caused widespread disruption.
David Cameron, Michael Gove and other Government figures depicted in a variety of unflattering manners by striking public sector workers.
Hundreds of schools are to close tomorrow as teachers join strike action. Find out what schools in your area are affected.