Correção de texto: O crescimento do custo da folha salarial

Pessoal, a respectiva tradução que eu fiz tem algum erro?

O levantamento, feito com base em cruzamento de dados oficiais pelo consultor legislativo do Senado Marcos Köhler, confirmam as queixas do governo federal, governadores e prefeitos sobre o crescimento do custo da folha salarial dos servidores nas despesas públicas. Em 13 anos, pulou de cerca de R$ 880 para R$ 1.650 a disparidade média entre o que ganha um funcionário do Estado e um profissional do setor privado.

The survey, conducted on the basis of official data crossing the legislative consultant of the Senate Marcos Köhler confirm the complaints of the federal government, governors and mayors on the cost of the increase in the payroll of the servers in public spending. In 13 years, jumped from about R $ 880 to R $ 1 650 average disparity between winning a state official and a professional private sector.
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With cross-checked data of ([a]source 1 and source 2), the Senate´s Legislative advisor Marcos Köhler corroborates the claims made at federal , state and municipal levels - about their payroll ballooning. The claim is that this happens because of the increasing pressure in public expenditures with their civil servants.
So, he argues, in the a 13-year span, the gap between public and private wages has gone from R$ 880 to R$ 1650.
([a]could be “of several government ministries/from IRS and the Brazilian Treasury? - to have a cross-checking one needs at least two sources...)

The original item is featured at
http://economia.estadao.com.br/noticias ... 0000079369
One of the comments read "Curiously, the advisor recommends freezing police and education workers/teachers etc, that in average make R$ 2,000
While he (the advisor) earns R$ 40,000 working in the Senate.
"
Plus, the Senate itself and the Judiciary is not complaining, only the executives branches...

More on the pay for civil servants of the legislative in Sao Paulo, not to be confused with civil servants in general.
http://webcache.googleusercontent.com/s ... clnk&gl=br