The simpler the language, the broader your audience. Simple also means classic, unembellished, informal, unaffected and unpretentious. This list doesn't sound like a child is writing. In fact, it's elegant. Scrutinize your fancy vocabulary and replace correspondence with letter, compensate with pay, indicate with show, purchase with buy, implement with do, visualize with see, informed with told, numerous with many, initial with first, commence with begin, sufficient with enough.
Good writing is conversational.
No, of course not. We use them with awareness, with judiciousness, when we need to sound formal or solemn. Not to prove we've been to college. All rights reserved.