Possible Clues:

• They look after the personal needs of others
• Domestic staff
• Mansion staff
• Staff
• Those waiting to fight in the army? Mostly workers!
• They're employed in the service of government
• Staff on bender near drunken taverns
• Old Bob and Reverend confused by small insects found downstairs in big house
• The rest of the vans are for the staff (8)
• Household staff