The following table presents the audit fees Flagstar to Baker Tilly and PriceWaterhouseCoopers for the respective fiscal years (obtained from Form DEF 14A filings):

Fiscal Year	Baker Tilly	PriceWaterhouseCoopers
2013	1,415,228
2014	1,703,851
2015	1,049,743	3,042,951
2016	0	3,040,403

The fees paid to PriceWaterhouseCoopers far exceed the fees paid to Baker Tilly. Why would PriceWaterhouseCoopers command such higher fees? Why would Flagstar be willing to pay such higher fees to PriceWaterhouseCoopers?