There are companies out there, private ones, where their customers are happy, their employees are happy (most of the time) and their retention is high.
Ambitious, hard working people like promotions, so they gravitate towards growing companies and not stale companies.
Ambitious maybe (though that's nearly the definition of ambitious). Hardworking, not necessarily. I know a cement guy that you have never in your life worked a harder day than who has never received a promotion nor even sought one.
Companies that aren't growing? I meet A LOT of companies (about ~50 or so a year) and I can tell you there is massive difference between the distressed ones and the ones who are growing. btw - even 2~5% growth is fine, it doesn't need to be 25% google scale growth...but flat or declining is bad.
So, what to bonus the CEO on? Stock price appreciation. Stock price valuation loves growth. So even though a flat business throwing off 10% profit is a very nice business to be in, the only way you can increase stock price is to grow margin, which is really hard and attracts competition. Ergo, CEO is going to try to grow the company to boost the stock price. That's one reason dubious mergers are pursued, as it at least will goose revenue and profit. Wise investors might use return on equity or capital as well, but the market in general biases towards the revenue and profit metrics. Stock goes up, CEO gets their bonus.
For a private company, slow or flat growth with a nice profit margin is great, and without having to favor growth at all costs for pesky stockholders and analysts, you can pick and choose when a good opportunity comes along, and grow a bit anyway.
Businesses are valued based on discounted cash flows (DCF). If you're profitable and not growing, your cash flows are very stable & easy to evaluate -- you get a low P/E or P/E/G ratio. But if you're growing quickly with sane unit economics, most of the DCF value is in future years... which then results in much higher multiples relative to today's revenues & earnings.
Not the company, unless selling stock to raise cash.
Not the employees, if paid in cash instead of funny money.
Nobody needs that.
It's cultural.
People see other people’s wealth growing quicker because their investments grew more, increasing demand for higher growth investments.
Population growth inherently leads to economic growth assuming a sufficiently stable society and access to resources.
All of these create an environment where people expect certain ROI and make plans according to those ROI.