I'm making some research about consulting companies (Tech consulting).

This industry is known to have a very bad reputation for lots of reasons.
Among others:

• The way they treat consultants
• Low salaries
• Type of projects consultants are working on (not interesting missions)
• Not much/No training
• Bad relationship with the manager (who is often a sales person with no tech background at all)

What would be, in your opinion, the perks/processes/code of conduct that a consulting firm should have in order to attract (and keep) good developers ?