The effect of high salaries on levels of labor supply is likely to be marginal. People work in part due to the significant social pressure of having a job and advancing themselves comparatively against others. This motivation will still exist, as there will still be rewards to advancing your career; a salary closer to the salary cap, and the added responsibility and social (or business) standing such advancement provides. While there may be fewer people willing to work 18 hour days, 6 days a week, this work is being done because it is valuable – so the firm will need to employ more people to do it, and the work is spread over a larger number of people, possibly even increasing employment