What's the issue with "… disproportionately affects …"? It seems to be a correct English construction (even though the frequency in COCA is relatively low; 72).
Some examples:
> Indeed, the recent cases of hyperinflation in Brazil, Argentina, and Poland illustrate that although hyperinflation is harmful to savers and disproportionately affects the poor (The Independent Review)
> A hearing is set Thursday on the new version of a legislative bill to eliminate scheduled pay increases for state employees that nixes a section that disproportionately affects rural legislative information offices (USA Today)
> Suicide is a key mental health issue which disproportionately affects men. (london.gov.uk)
Some examples:
> Indeed, the recent cases of hyperinflation in Brazil, Argentina, and Poland illustrate that although hyperinflation is harmful to savers and disproportionately affects the poor (The Independent Review)
> A hearing is set Thursday on the new version of a legislative bill to eliminate scheduled pay increases for state employees that nixes a section that disproportionately affects rural legislative information offices (USA Today)
> Suicide is a key mental health issue which disproportionately affects men. (london.gov.uk)