The answer depends on where you are.
In U.S Tax authority pays close attention on Cash income in your bank account, which means if your income is illegal, you better keep it in some secret places at home. Billions of such underground money are stored in U.S. An economist proposes that a moderate inflation will indirectly taxes those illegal activities by making those underground money lose some value each year. If your question comes from a U.S textbook, the answer will be those holigans hate inflation, like deflation, since the former take away some of their hidden money. Actually, for consumers they don't carry more money when there is inflation, they simply put more money in their money and check account, so called near money, which has same use of cash.
Good luck