Spending on outsourced worker services makes up the largest dollar chunk of U.S. government contracting, according to a March 11 Congressional Budget Office analysis for the House Budget Committee, but the agency can't determine how many jobs it funds.

Spending for professional, administrative and management services from the private sector grew the most in real dollas between 2000 and 2012, says CBO in a letter to Maryland Rep. Chris Van Hollen, ranking committee Democrat, who had requested information on the "size and cost of the federal government's contracted workforce."

Of the $500 billion that federal agencies spent for contracted products and services in 2012, the largest component—$94.7 bllion—was for professional, administrative and management services, says CBO. That figure was up 146% from the spending total in 2000.

该分析说，2012年的代理商在与“设施有关”的服务和建设上花费了第二大数量，比2000年的791亿美元增长了26％。

According to the CBO data, spending for engineering and technical expertise was the highest among all services categories—accounting for $17.4 billion in 2012. The government spent more on fixed-wing aircraft and liquid propellants, says CBO.

The analysis reports that spending on contracted worker services among non-defense agencies rose a whopping 173% during the 200-2012 decade, from $14.8 billion to $40.4 billion. The U. S. Defense Dept. spent $54.3 billion on such worker services in 2012, up 129% from $23.8 billion spent in 2000, says the CBO analysis.

CBO says its analysis is taken from the Federal Procurement Data System-Next Generation, known as FPDS, which it described as the only source for comprehensive federal contract spending data.

但是，国会议总会保证其数据准确性已受到质疑，而FPD的数据库或任何其他人都没有“报告联邦合同资助的总劳动力的规模”。

CBO指出，国防部最近开始收集有关其某些服务合同资助的“全职同等职位”职位的数据，但它不包括与设施相关的服务和有关分包合同的信息。

According to CBO, however, the "accuracy and completeness [of the new DOD database] are unknown," and it also does not allow the budget office to compare task performance costs between federal and contracted workers.