Public sector fat cats

As income and council tax bills increase year on year, it's warming to know that pay for top civil servants increased by a healthy 9.5% last year. Clearly not all increases in public sector spending seem to be getting through to the "front line". Would these executives have worked "as hard" if their pay rises had been limited to 4.5%? This would saving taxpayers money in the short term and reduce final salary pension payments in the long term.