Employees are trained deeply in in-house systems that have little value outside the company, so leaving would mean a step down and a retraining gap, and they stay because they have to.
An example
Since joining a commercial builder out of college, a senior estimator had worked only on the company's in-house estimating system, which its founders had written in the nineties and nobody else used. Every training dollar in his department went to new modules of it. When margin pressure led to two years without raises, he called a recruiter. The recruiter told him the general contractors hiring estimators all wanted fluency in two industry-standard packages, neither of which he had touched, and that he would probably come in at a mid-level role for a year or two. He had a mortgage he could not cover on a mid-level salary. He stayed. Three younger colleagues took the same calls, spent a few months learning the standard tools at night, and left.
Why it works
Staying is easy because the employee's competence is fully realized inside the company, with no relearning curve. Leaving loses most of its appeal, because years spent mastering in-house tools are worth little on the open market, where employers pay for standard skills, and it is expensive, since it means a step down plus unpaid time to retrain. The company gets retention without paying for it in salary or interesting work. It works best where the company has scale for custom systems, the outside market for the role is thin or shifting, and the employee carries fixed financial commitments.
The thinking behind it
Oliver E. Williamson The Economic Institutions of Capitalism (1985) explains asset specificity: knowledge of one firm's systems loses much of its value outside the relationship, so the person who holds it is tied to the firm. Years spent on an in-house estimating system are exactly that kind of investment, which is why the outside market offers a step down. Keeping industry-standard skills current lowers the specificity and restores the outside option.
William Samuelson Status Quo Bias in Decision Making (1988), by William Samuelson and Richard Zeckhauser, found that people choose an option disproportionately often when it is framed as the status quo, and attributed the bias partly to transition costs; a preregistered replication supported three of the four scenarios it retested. A retraining gap adds a large transition cost to the ordinary pull of staying, which is why checking market value early matters.
Warning signs
Training spend flows almost entirely to in-house tools. Staff resumes list no industry-standard skills, and job postings in the field ask for skills nobody inside has. Recruiters tell long-tenured people they would have to come in at a lower level. Pay stagnates with little attrition among mid-career staff, while early-career people leave.
How to defend yourself
Maintain industry-standard skills alongside the internal ones, even if it means learning them on your own time.
- Ask for training in standard tools, or for portable credentials, as part of your development plan.
- Check your market value with recruiters every year or two, so you know the gap before you need to.
- Negotiate a retraining clause into any severance or retention agreement.
- Look for rival employers willing to absorb the retraining cost; some will.
Early in a career a reset is cheap, and it gets more expensive each year.
How a leader shuts it down
Pair proprietary systems with standard ones wherever possible, and train people on both. Offer portable credentials, and include retraining clauses in severance. Watch the pattern of attrition: if only early-career staff leave while pay stagnates without complaint, the company is probably retaining people through dependency.