When contracts are awarded to companies based on lobbying and donations it stymies competition.
The following quote is from the report linked at [1]. It's worth reading the entirety of that report.
"the growing politicisation of public service, exemplified by political appointments to government bodies (Griffiths et al. 2022), may spill over into the contract market. Links between politics, donations, and contracts may negatively impact competition and firm entry".
[1]: https://e61.in/wp-content/uploads/2023/07/Political-Economy-...