If they have no cash and only draw a salary, it will still hit them badly, as salaries are not inflation adjusted, and any pay increase requires negotiations with the employer - who may decide to increase the wage by only a fraction of the inflation.
Said differently: all people who don't have wealth in inflation proof assets (stocks, real estate etc) suffer from inflation.
Not everyone in the world has easy access to credit like you imply. You're the one pushing an agenda here.
Except those who are in debt
Depending on how hard is the inflation, you receive yearly, semi yearly, monthly, weekly or in extreme cases daily adjustments. Your salary updates also include the expected inflation.
That's of course when the economy is performing well. If the economy is slowing in an inflationary environment, you may easily end up on the wrong side since every update is actually a salary renegotiation and in a slowing economy your job might receive pay cuts in real terms.
also people with assets are not totally protected from inflation. suppose I bought a $10k asset in 2001 that, for whatever reason, perfectly tracked inflation. if I sold it today, I would owe 15% tax on a nominal gain of 50%, resulting in a real loss.
It's sad engineers making even $200,000 or more can't understand how even $100-1000 in the bank can change lives forever for many people in poor countries.
It's even sadder when some of them come from places that had hyper inflation, and can't see the big picture.
https://www.thebalance.com/what-is-the-average-bank-account-...
In my experience, the libertarian community that hates inflation so much uses the poor as a rhetorical cudgel rather than an actual primary concern.