Well...... Not just literally steal , even mostly not actual theft .
Shennagins with unspent Campaign Funds would be more of fraud .
Influence - Could be out & out cash , but all kinds of ways with minor fig leaves of large speaking fees , book deals , stock tips , etc .
Sometimes the Pol will actively have their hand out , but absolutely no shortage of intrests voluntarily and enthusiasticly offering .
Plus , inherently without being crooked about it , when they leave / retire , they will be high status , with aura of gravitas and influence ( unless they try to **** everyone off , or get cought up in very bad scandal ) . The majority are lawyers . It will boost their law firm / practice . They will be sought out for business opportunities and board positions .