Most of the bounty managers have their website in which they upload the bounties in which they manage and make it easy for the hunters to find the bounties they manage and easy accessible for hunters. But these managers don't do upload spreadsheet for hunters to see their stakes.
The bounty managers on Bitcointalk always have their spreadsheet shown to hunters and make them awear of the qualified people and the rejected hunters , but to find the bounty of some favourite bounty managers is not that easy.
I think doing bounties in this forum is much better as everything is transparent here and we can see all the spreadsheets and payment transactions in the bounty thread.
Being a manager is far better than doing bounties, when in terms of work the manager has the easiest job and when it comes in payment the manager has the highest amount that will get.
You should know that Not everyone can become manager. Of course Manager are paid higher then the members who do the Job. Manager has to overall manage the campaign.