Had prominent party members used their influence to enrich themselves? If so, were there any attempts to punish them for it?
/u/Georgy_K_Zhukov had an answer here speaking to Hitler's corruption in particular. That answer details corruption, abuse of power, and "donations" from businesses that enriched Hitler.
There's a ton of room to expand on corruption in the Nazi regime as a whole, but hopefully that answer gives you some good info.