Skoog and Toppino had a variety of objections to the worklife tables, including:

• inappropriateness of Current Population Survey (CPS) data
• measurement errors in various elements of the definition of work disability, including problems with the first work disability question and self-reported disability measures
• mixing of statistics for persons with permanent and temporary disabilities
• mixing of statistics for persons who are injured and chronically ill
• failure to incorporate active and inactive worklife expectancies
• purpose of the CPS
• use of a six-year average of data
• use of a disability definition not consistent with the Americans with Disabilities Act
• inability to change between disability statuses
• use of average disability statistics

Gibson, David S. and John P. Tierney.  "Disability and Worklife Expectancy Tables:  A Response."  Journal of Forensic Economics, 13(3), 2000, 309-318.  

John McNeil, formerly of the Census Bureau, has also authored a response. 

Other answers to specific issues can be found on this website.