According to critics, what was wrong with the spoils system during Jackson’s presidency

According to critics, the President committed corrupt acts.

Explanation:

Thus, the President brought his friends and those who supported his political vision to many important civil service positions. The President himself noted the importance of fighting corruption, but this was not the case in practice. Many of these people were not able to perform the jobs in the positions they were brought to. With these moves, the President endangered the state apparatus's functionality, and the incompetence of these people was reflected in practice several times.

b) the importance and limits of political power.

i believe the answer is:

-   william jennings bryan is a democrat while mckinley was a republican

at that time, the segment of population that choose for democratic party were the voters with low economic background and vice versa

- william jennings has support of populists and wants to have inflation to farmers while mckinley has support of bankers and businessmen , doesn't want inflation

the fixed value of gold make the large business able to stack up their gold without   being worried that it would devaluated.

- william jennings supported the silver standard while mckinley supported the gold standard

according to jenning, using other metal beside gold could the poor people to have more purchasing power and them advance in the society.